Acti-Flex 4000 by Cox Labs has an advanced, fast-acting, liquid formula of Glucosamine, Chondroitin, MSM, and Superoxide Dismutase. THese ingredients occur naturally in the body, serving the function of repairing joints and many other tissues. In Acti-Flex 4000 they, andother key ingredients work together to improve performance by increasing the horse's supply of joint-lubricating synovial fluid, which repairs and strengthens stressed body parts.
- MSM adds a powerful ability to improve sulfur bonds, which are an essential component of all connective tissue. - Ascorbic Acid (Vitamin C) is a key to optimizing bioavailability of the other ingredients, as well as being an essential antioxidant. - Boswellia Serrata is an herb that is proven to reduce inflammation. - Hyaluronic Acid (HA) plays a critical role in maintaining healthy joint synovial fluid and preventing the deterioration of aging, over worked joints. HA has a high daily turnover so large amounts are needed to maintain proper levels within the joints. HA is also shown to influence cell movement, blood vessel formation, critically involved in healthy wound healing and serves as an antioxidant.
By supplementing what a horse produces for itself, Acti-Flex 4000 speeds the body's self-repairing processes.
Guaranteed Analysis Per oz. Glucosamine Sulfate 8,000 mg. Chondroitin Sulfate 4,000 mg. MSM 3,000 mg. Ester C (Ascorbic Acid) 1,000 mg. Yucca 150 mg. Hyaluronic Acid (HA) 125 mg.
Feed 2 oz per day for the first 5 to 17 days then reduce to a maintenance dose of 1 oz per day. Mix into regular feed or administer via a dosing syringe.
The quart size provides up to a 32 day supply for one horse.
I have been an avid Finish Line H/A customer for 4 years but when I came across the Acti Flex 4000 I couldnt believe how much more milligrams there were of all the same ingredients as Finish Line H/A and it was $10.00 cheaper AND came with a bonus Quart as well. So win win win!!! I am so happy with this product and my horse is picky about his supplements but he had no problem eating the Acti Flex up. Thanks so much.
- G C, OR
Ari likes it
Our off track Thoroughbred gets Acti Flex 4000 on a daily basis. She has an old starting gate injury causing minor arthritis in the hock. Ari has plenty of mobility because she gets the Acti Flex. It was recommended to us by her previous owner.
We highly recommend it to anyone!
- Bess Leonard, IA
Acit-Flex is a keeper
I have dachshunds and I do believe this has been keeping my seniors in a more pain free environment
- Cindi, TX
My vet recommends this for my horses sticky stifle. Ordering from Big Dees is quick and easy!
Acti Flex 4000
I used this on a mare that could not hold up her hind leg long enough to be trimed. After she was on
Acti Flex she was able to stand and be trimed .
- Karen, IL
Acti Flex 4000 is a great product. We operate a horse rescue here in Ohio and we often times deal w/ arthritic horses. When we have a horse that is showing joint stiffness or any other joint issues Acti Flex is the product we turn to and Big Dees is where we come to purchase it. With the free quart w/ every gallon you cant beat it!! We will be back for more for as long as you continue to sell it!
- Equine Salvation, OH
I have been using this product for about 1 1/2 years and noticed an improvement within a week of starting it. I have an 18 year old paint mare, and it has really helped her.
- Marion, FL
THE BEST JOINT SUPPLEMENT
I have used this product for years. It supports my old guy and helps him deal with his arthritis. I started my younger horses on it years ago and as they have aged, they remain very sound. I thInk it is a great supplement and the horses eat it in their food without a second thought.
- MARY, GA
Best Liquid Vitamins and natural pain relief for dogs
My german shepperd is 8 yrs old. I thought our family had to give up hope with his life since he has arthritis and hip dysplasia. We gave Acti Flex 4000 a try and within 2days we saw major improvement. Not only in his pain but in his mobility and youth again
- Bobbi, NV
Actiflex and dachshunds
I truly believe that this supplement helps keep my performance dachshunds in better shape due to helping their backs stay healthy.
- Cindi T, TX
I loved the Acti-Flex product! I could tell a huge difference in movement and comfort level in a matter of just a couple of days. Great product, I will contune to purchase more in the futrue.
Of couse wed like 5 stars. We always want immediate results. But, the results we got with our 11 yo Airedale bitch has been phenonmenal. Her limp has all but disappeared. She is even romping with the 5 yo in the yard and hiking like a champ. Thanks
- Susan York, WA
Best Product Ever!
My 11 1/2 yr old German Shepherd did not respond to glucosomine/chondroitin tablets. I tried Actiflex 4000 and in 3 days he was running in the house, chasing tossed toys, and not moaning when getting up or laying down. I give him his dose with a little bit of milk. He feels like its his icecream treat. He lets me know that his wants it dished to him when I get home from work. My vet approves too. Ive spread the word to all of my dog friends and they are pleased too.
- Ginny Grand, TX
Horses feeling great!
I have a 9-year old mare and a 19-year old gelding on this product. I have been giving it to them for about 2 months and they are really feeling good and running barrels well. I dont know why, but their coats are also super shiny since putting them on this product. Ive had several people mention how they shine. I will keep them on this product throughout the competition season.
I have used this product for years, first to help make my 28 year old comfortable. All 4 of my horses are on it now. One of my horses has significant arthritis and this product has put him back on his game. Big Dees provides fast delivery and a competitive price, I have been buying this from them for 2 years.
I also use the Actiflex Canine formula for my 3 dogs!
- Mary, GA
I am using Acti-Flex 4000 liquid on several horses from 5 - 13 years old and there was a noticable improvement in the performance of each one after using it. They all seemed to be free-er in their gaits, stops and spins we have reiners It is very affordable with the same ingredients as products 3 times the price. I wont use anything else!
- Cheryl Henlsey, OR
ACTI FLEX 4000 - One that REALLY works!
I have been using this product for many years and even my 20 year old retired jumper is still sound! I had stopped my joint supplements for about 4 months and noticed a big difference- so put them all back on it- and AGAIN- noticed the difference after 7 days back on this product! I have used all of the big expensive brands- and this one works just as well in y opinion and is very economical - especially when you have more than one horse to supplement. I love this product and I love Big Dees for making it economical for us!
- Dawn Minger, FL
My horse eats it with no problem. Started using it a month ago and already see signs of improvement. Will continue to order from Big Dees. Always great service and fast shipping!!
- Pam, MI
Service was GREAT! My horse loves the product! I could tell a difference right away.
Well I was hoping this stuff would help my mare with Hock soreness.Nothing yet! Ill give it 6 months and them maybe I can give it a better rating.
This was the first time using ActiFlex 4000 and found that using a little of this product went a long way. It was noticed within the first week how much more flexiblity and grace he walked. We will be using it again!
Acti Flex 4000
love this product,its inexpensive last a long time and you really can tell a differnce in 48 hours sometime within 24hours!
- Alexis Cody, FL
I have been using Actiflex 4000 solution for my horses for 4 years and think it is the best! I like it so much that I gave the canine version to my dog when he started showing signs of arthritis. Makes a dramatic difference in both cases.
- Mary, GA
My dog Gracie was collapsing every time she ran due to her arthiritis in her spine. After being on Actiflex 4000 she is now ablle to run again without collapsing. I had used many other products prior to this and nothing helped. I am thankful I found Actiflex4000 and Gracie thanks you too.
- Angelika Blossfeld, TX
Acti-Flex 4000 is GREAT!
We have been using this product for several years on a couple of arthritic older horses, and it works great. Our vet said he had never seen another product that had all of the ingredients in it that the Acti-Flex 4000 has. The old mare is super picky about what she will eat, and we just pour this on her food, and she eats it right up. It has made a huge difference in both her and the older gelding who were both pretty stiff and sore before we started using this.
- Susie LaBeth, KS
Acti Flex 4000 is Great !!!
We have show pigs, and we give them Acti-Flex everyday. We find that it helps extremely well. We have used 2 gallons just this show season. With all the high Protein in feeds and additives, the acti-flex really helps keep the pigs sound, and they love the taste. By putting it on the feed, it also helps them eat better.
- Betsy Welch, LA
Acti Flex 4000
Love this stuff......saw a decrease in swelling in my racehorses ankles in a week....
- margo, NJ
My mare thinks its great
I have been using this supplement for about 2 years. My mare has no joint discomfort being a former jumper. She likes the taste and it keeps her gliding along.
- Holly, CA
smart later than sooner
Suckered into buying other, more expensive, product that does exactly what this does for much less. I use as preventative for my western pleasure horses. No injections so far!
This is a homogenous solution that never settles out, has a pleasing aroma, and when you compare the ingredient list and amount per serving you definitely get more for your money. The promotion of a quart free with each gallon purchased is icing on the cake!
- Robin Farabee, NC
older horse needing some joint help? This is the real deal!
I have a 27 yr old who was used very hard as a younger mare. Her feet were not trimmed regularly and her joints took a pounding giving lessons. Now she is showing the wear and tear. I have tried many joint supplements but none compare with the Cox Laboratory ActiFlex 4000 Solution. It is affordable and works. I have my 21 yr old Arab mare on it too and she also showed an improvement in her movement and temperament.
Great Joint Supplement for great price
I purchased this joint supplement because it was very affordable with the same ingredients as products 3 times the price. I wasnt expecting as good as results but I have had better results than the other higher priced products with HA while not breaking the bank.
I have used Acti-Flex 4000 liquid on several horses and there was a noticable improvement in the performance of each one after using it.
- Jean, IL
Great supplement on the market
Ive been using this product for over a year now and I feel that it is a better product than the one that I was using before. My horse is older and I believe that he is moving much more freely than when I was using the other product. I would recommend it highly.
ACTI FLEX 4000
ACTI FLEX 4000 has been wonderful product for my horse. I have a 11 year old American Saddlebred that had previously foundered before I got him 4 years ago. He has recovered from the founder, but he seemed to favor his right front leg, also he had a lot of snap, crackle, & pop in his hind legs; really bad in the cold weather. I tried different products, even shots. Then recently he started tripping when I was ridding him. I have a friend/trainer/farrior that told me about Acti Flex, she said it really worked for her horse. I started him on ACTI FLEX 4000 this October. To make a long story short, after 2 weeks there was a very noticable difference in riding him. I also realized he doesnt snap, crackel, & pop any more. It has truly made a world of difference in my horse.
Acti Flex 4000 is AWESOME
I have been using Acti Flex 4000 for two years after trying MANY other EXPENSIVE joint supplements. Both of our big Warmblood horses are on it; one is 17 and the other 7 years old. The 7 year old is a jumper and the 17 year old is now semi-retired. GREAT product!
- Joan K., CA
Acti Flex 4000 Solution
It is an awesome product that we just will not do without and Big Dees is the place to buy it, best price and lightening fast shipping.
- Darren, IN
Very palatable, smells delicious and the horses love it. Ive not only seen great improvement with my friends horse but what a difference I feel with my own! Love all the ingredients and theyre all competition legal : Thank you acti-flex :
- Maria, NY
ACTI FLEX 4000 SOLUTION
I love this product. I could tell a difference in my barrel horses the first week. I will definately keep buying this product.
- Tonia Williams, NC
Amazing product & company
So much cheaper than the other brands & works the same way. So grateful for the free quart container you get with the gallon size. Thanks
- Kim, FL
Acti Flex 4000
Have used this for several years for my competition horse. Vet said it looked like it had everything needed. And Big Dees has the best price.
- Cathy Gage, IN
Acti Flex 4000 Is A Must For Our Horses
We had tried several joint supplements before we lucked onto Acti Flex 4000. We saw an improvement in movement within a week. It has all the ingredients you could want in a joint supplement & one of the highest with HA. Not only does it work, but the horses love it. It doesnt matter how good a product is if a horse wont eat it.
- Jackie Ray, OK
Cant believe this product
Very few product come as advertised. Our 13 year old Airedale was stiff with arthritis and would just lay around the house and sleep. We tried Acti Flex 4000. Two tsps. a day for a week and then reduced to one per day. I couldnt believe it. In about 5 days the dog was back to his 1 1/2 mile walking routine. The stiffness appears to be almost gone. I highly recommend Acti Flex 4000.
- Jack, ON
Acti Flex 4000 is the best
Have used a variety of joint additives and this is the best! Easy to use and the horses lick it up. Ive noticed added pep and joint flexion in every horse who uses it!
- Kathy, MD
Happy Barrel Horse
I have been very happy with the ActiFlex 4000. My daughters barrel horse has been on the suppliment for a month and we can already see that she is more comfortable after races and seems to be moving with more ease around the barrels. We will definately keep using the product.
- Sandy Wilson, NC
Great product for all ages!
I absolutely swear by this product! I use it for all of my show horses...from the first day they go into training as a two year old through the aged show horses. It works to make the older horses more fluid and comfortable. When on this product, the younger horses seem to stay happy and dont need the injections that some others might require! Just a great product at a reasonable price!
- Julia, TN
Best Supplement - Best Price
Has the best combo and highest level of HA.
My horse is happy!
I have tried many products promising results. But ACTI FLEX 4000 SOLUTION is the only product that worked for my horse. I highly recommend this product!
I am giving this product to two of my horses, Sweets 12yrs and Cowboy 6yrs. They both are more fluid in their gaits and are really wanting to get in the ground in their stops .... we show reiners and cow horse.... Thank you for offering Acti-flex 4000 and PLEASE dont discontinue it!!! It is the most complete supplement I have found and you are the only place I can find it at a reasonable cost!
- Cheryl Hensley, OR
Since I switched to the Acti-Flex product as my joint supplement, when hauling hard and asking my horses for 110% I believe that with the herbal bute product included I feel they handle all the traveling w/o any soreness. Although I have no joint issues and am using this as a preventative, my horses continue to feel good and keep getting a clean bill of health at the vets office.
- Laurie Cooper, TN
Great joint supplement for older horses
The Actiflex 4000 soultion has made a great difference in my older gelding keeping him sound and comfortable at an affordable cost.
Recommended by my vet and when I buy the gallon and the quart together they last about 6 months for one horse.
Works well to keep him going. My gelding is 33 yo and still jumps.
Acti Flex 4000
I have a 7 year old with hock injury, put him on Acti Flex 4000. I had the Vet out once to give in injection into the hock. A friend told me about Acti Flex 4000 and I have not needed the Vet since. My boy hasnt missed a step since being on Acti Flex 4000. It is worth every penny! Smells yummy, he gobbles it up.
great product, great price
Ive been using this product for a while now. It keeps my 11 year old AQHA gelding moving smooth and easy and feeling good. Compare the label and price and you will see you really get a lot of bang for your buck with ActiFlex 4000.
Have a mare with a stifle problem and tried this product with great result. All of her symtoms of a problem never appear while on this solution, but have to keep her on 2 oz a day all the time. When I drop her back to 1 oz I notice a slight difference in her movement.
- Jill Andrews, NM
Great product! Bought this for my mare who just had stifle surgery, has the highest amounts of everything including the HA! and for a great price! I have already noticed a difference. Plus my mare is a picky eater and loves the taste of the acti-flex! Highly recommend it!
- Liz, WI
We love this product - almost every horse in the barn is on it. We have seen great results with our own 2 horses and everyone who is using it raves about it.
- Kathy, NC
Started my Acti-flex on July 21, 2011 for my 18yr old QH mare. She would creek and pop in her leg joints when she walked or picked her legs up. It took about 2-3 wks of 2X daily dosage to see improvement. She is now down to once daily and has much less creeking and it also seems to have taken down the swelling in her knee.
- Denise Surek, ME
A Joint supplement that actually WORKS !
I have my 3 older horses on this and it has made a big difference to their mobility. My 17 y.o. rope horse used to be very stiff in his joints untill I put him on Acti Flex 4000....because of it I did not need to inject his hocks :
I have recommended this product to other horse owners and they have been happy with the results too.
Not just for horses!
AF4K is a terrific supplement for dogs too. I know Cox makes a canine version, but its twice the price and half the dosage of the horse formula. I use 2 teaspoons once a day for large 65lb+ dog. Supplements like this have been proven in the world of greyhound racing just like in horse racing. My pet greyhound has been on AF4K for years and does well on it. Ive recommended it to other owners of arthritic dogs and they too have had positive results. Your mileage may vary, if in doubt, contact your vet.
Best joint supplement Ive used!
Great product, Keeps my Sr ex-eventer sound and flexible. I could tell a difference in his stiffness/lack there of after the first week. Warmed up great and had a lot more pep in his step. He now MARCHES rather than walking! I add extra MSM but for the price, its still one of the more affordable supplements there is.
- Kayla A, MO
I love this stuff there is no way my horse could walk without it its great an affordable, very good quality!
Acti Flex 4000
I have a 14 year old Quarter Horse cross that was not completely sound when I bought him - he looked like he had seen better days, but he was super nice. I tried for a year or so to get him sound, finally someone suggested Actiflex 4000. I tried it and the results were almost immediate within 1 week I saw dramatic improvement he is still on it and I plan to keep him on it. I highly recommend this product
- Lisa, MD
Being osteoarthritic, my guy is much happier on Acti-Flex, now he is semi-retired and loving it. I had stopped Adequan after a few months on this product. Saves on the pocketbook.I tried about 15 or more joint supplements and this one he loves, it smells sweet unlike some other ones that smell like old fish.I can definetly notice if he missed doses and I double dose him if he gets stuck inside due to weather.Love, love,love Acti Flex!
- Aileen, FL
Keeping my Trail buddy feeling good!
My older horse had just started getting a little tight but with ActiFlex he is able to move without popping and cracking. ActiFlex solution has a good smell and my horse eats it right up.
- Deb, OH
I have been using Acti Flex 4000 Solution for almost 1 year now on my 3 TBs; ages 23, 21 and 15. The 15 yr old was on the racetrack until age 11, so even though only 15, I have seen improvement in his daily activity. I previously used several other products over the past 6 years, but find Acti Flex 4000 to produce the benefits and effects I want for my horses and at a fair cost. Also they LOVE the taste. I highly recommend this product.
- Candace, FL
love actiflex 4000 and especially the free quart size that come with it
- tara, LA
Acti Flex 4000 - highly recommend
Great Stuff, I have a 17h WB mare - 10yr. Due to her shear size and weight, needed to give her something to soothe her joints. I saw a marked improvement within 3-5 days and no longer hear the rice crispies snap crackle and pop when she moves!
I have been using this product for several years. After trying many different products claiming to do the same thing as Acti flex I always come back to it. I would highly recommend this product.
- Kathy, MA
Active flex 4000
This product does what it is advertised and recommended to do. It relieves joint pain in our animal to allow him to move more freely without using RX pain relievers. Good product, does what it says. I cant ask for more. Thank you!
- Ken, MO
My horse had a limp after riding
He had a limp after riding. He has had this problem for about 12 years I just found out he is 14 yrs old. Now I ride 2 to 3 hrs no limp great product
- Terence, NC
ActiFlex 4000 is fabulous
I have used it on my 17 year old 4ft jumper the past two years and he is in great shape!! www.onefineequine.com
*And BigDees has the BEST price for this product*
- Emily, NY
Maintenance is the key to prevention. I have a young performance horse and didnt really need any joint supplements. Tried ActiFlex 4000 and noticed my horse seemed more comfortable within the first 20 days of use, and his performance & willingness noticeably improved. Have been using it since.
Great joint supplement
We have 3 horses in different age groups - 5, 9 & 13 - with different joint issues related to injury, training, and age. After a week, they all seem to move more fluidly with less stiffness in the joints - especially the hind end. The bottle with the built in measuring resevoir is really handy!
Great Product - Great Price
I have been able to see a real difference in my horses since starting them on Acti-Flex 4000. It keeps them running with very little maintenance & the price when compared to other products is awesome.
- Chris Franks, MS
ACTI FLEX 4000
I am extremely pleased with this product, both my horses have shown improvments in their movements and have not had the popping and tying up since gettting this.
- Karen Godwin, FL
Shipping & Handling - Orders under $70.00 are subject to a $6.50 handling fee. You will be charged actual ground shipping charges based on total order weight on items marked FOB (Freight on Board). FOB items are typically those that weigh over 1 pound. All other non-FOB items ship FREE. Express Shipping is available upon request at an additional charge - please contact customer service at 1-800-321-2142 for expedited services and shipping quotes.
Special Shipping Situations - Some select products require special handling or special shipping arrangements. These items will be marked with the following icons:
FOB Truck Icon - Indicates an oversize or overweight item that will require delivery by a semi or lift-gate truck. These items may include horse drawn vehicles, large stall gates or stall mats. You are welcome to place your order on-line,a customer service representative will contact you with a shipping estimate prior to your payment method being charged.
Vaccine Shipment Icon - Indicates a vaccine or other temperature sensitive item that will require insulated packaging and expedited shipment. Vaccines ship Monday thru Wednesday only. Vaccines are temperature sensitive items that require insulated packaging and expedited shipment. ALL vaccines going to the West Coast will be shipped via Next Day Air at a rate of $24.95 per order. All other orders shipped outside of Zone 3 are required to go via Second Day Air at a rate of $9.95 per order. However, vaccine orders over $300.00 will be shipped freight FREE regardless of zone.
We do offer the 2nd day air shipping for $9.95 but it will not cover any warm vaccines when received. By choosing 2nd day air, you are assuming responsibility for any consequences if you should receive warm vaccines. No refunds will be given for warm vaccines when Next Day Air shipping is decline. The following states require Next Day Air to insure vaccines arrive cold - Arkansas, Arizona, California, Colorado, Florida, Idaho, Kansas, Louisiana, Mississippi, Montana, North Dakota, Nebraska, New Mexico, Nevada, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wyoming.
Rabies vaccines cannot ship to Illinois.
Backorders - In the event that an item is not in stock, but is expected to be restocked within 2 weeks; the item will be placed on backorder and will ship as soon as the stock is replenished. If there is a manufacturer delay in availability, you will be contacted with the current expected arrival date and an option to leave the item on backorder or cancel the backorder.
Shortages/Breakages/Discrepancies - Please inspect your packages upon receipt to ensure that all items in your order have arrived without damage. In the event that a package is visibly damaged from the outside upon delivery, either refuse the shipment from the carrier or contact us immediately to file a claim.
If you find an item on your packing slip that is missing from your shipment, or an item in your shipment is does not match that of what is on the packing slip please contact customer service at firstname.lastname@example.org or by calling 1-800-321-2142 within 3 days of receipt.
Returns - Returns on products that are in new, unused condition are accepted within 30 days of delivery. If you need to return or exchange an item, carefully re-pack the item along with a copy of your receipt or invoice. If the item is an exchange please include details of the item any size or color options that you prefer to receive in exchange. If you do not have a copy of your original receipt or invoice, or you wish to return an item that you believe may be defective or covered under a manufacturers warranty please call customer service at 1-800-321-2142 or email email@example.com to obtain a Return Merchandise Authorization (RMA). We do advise you to return your package via traceable carrier (FedEx, UPS or USPS Delivery Confirmation) as Big Dee's Tack will not be responsible for lost, damaged or undelivered return packages.
Please address returns to:
Big Dee's Tack & Vet Supplies
Attn: Returns (RMA#_______)
9998 State Route 43
Streetsboro, Ohio 44241
Non-Returnable Items - Returns are not accepted on the following merchandise: Vaccines (unless detained in shipping), Customized items, Custom ordered items, Non-Inventory Items, Video Games, Computer Games & Software.
Shipping outside the Continental USA - All orders shipping outside the continental USA including Alaska, Hawaii, Puerto Rico and the US Virgin Islands are required to pay actual shipping charges as well as any additional Taxes, Duties or Brokerage fees that may be charged upon entry into the destination country. Please be sure to check with your local customs agency to ensure all items that you wish to import will be given entry for delivery into your county. As a general rule any item that is fed-to or injected into an animal is not likely to clear customs for delivery. Big Dee's Tack & Vet Supply is not responsible for damages or losses due to shipment outside the continental USA or confiscation by your local customs agency. If you would like to place an order you may do so through our websites, be sure to choose "Other" as your payment method and place Shipping Quote in the noted field. Once the order is processed we will contact you with an estimated shipping quote and you will then be given the option to complete or cancel your order.
Offering a full selection of horse tack and supplies to the entire equine industry since 1976.
Shop for personalized clothing and gifts, horse supplements, stable supplies, English and Western saddles, casual and show apparel and footwear, Standardbred and Thoroughbred Racing Supplies and more! Enjoy friendly, knowledgeable customer service, bargain basement pricing, and quick same day shipping on in-stock orders placed by 3:00pm EST.
Big Dee's Tack and Vet is not affiliated with Big D Products, a California Manufacturer of horse blankets and equipment.