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Concentrated natural muscle developer

  • Combination of high-quality proteins & essential amino acids for muscle development
  • Includes enzymes to help aid in digestion
Fat-Cat is a concentrated natural muscle developer with amino acids to support weight gain, coat health, and energy levels. Fat-Cat is a great way to supply muscles with protein building blocks and beneficial vitamins and minerals.

View our Weight Gain Supplement Comparison Chart


Guaranteed Analysis Per 30 g (1 scoop):
(Maintenance Dose = 1 scoop (1.2 oz) daily)
  • Crude Protein, min.
  • Crude Fat, min.
  • Crude Fiber, max.
  • Salt, min.
  • Salt, max.
  • Biotin, min.
    210 mcg
  • L-lysine, min.
    610 mg
  • DL-methionine, min.
    17 mg
  • Calcium, min.
  • Calcium, max.
  • Phosphorus, min.
  • Potassium, min.
  • Magnesium, min.
  • Lactic Acid Producing Bacteria, min. (Streptococcus Faecium, Lactobacillus acidophilus)
    5.5 x 10^6 CFU/g
  • Amylase activity, min.
    10 BAU/g
  • Protease activity, min.
    15 HUT/g
  • Cellulase activity, min.
    0.848 CMC units/g
Ingredients:: Vegetable protein, dicalcium phosphate, dextrose, lactobacillus acidophilus, streptococcus faecium, dried bacillus subtilis fermentation extract, dried aspergillus oryzae fermentation extract, corn oil, flaxseed oil, l-lysine, dl-methionine, biotin, BHA/BHT added as a preservative, wild cherry flavor.


Instructions for Use:
Directions: The enclosed scoop holds approximately 30 grams, when level full.

BREEDING: Barren Mares 1 scoop, Breeding Mares 1 - 2 scoops, While in Foal 2 scoops, Stallions Standing 1 - 2 scoops, Stallion Working 2 scoops, Young Foals & Weanlings 1 scoop, Yearlings 2 scoops. 

EQUINE ATHLETES: Moderate exercise 1-2 scoops, Extreme exercise 2-3 scoops, Ponies 1/2 - 1 scoop, Pleasure horses 1-2 scoops.

Clinical Research

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    out of 5
    87% of customers would recommend this product to a friend!
    Tell us what you think!

    The reviews provided on this website represent the experience of the individual posting the review. We do not adopt, edit, or endorse any of the submissions posted within the reviews section. Rather, the reviews are part of an online community of animal owners that desire to share their particular experience with other individuals. These reviews are not a substitute for discussing the health of your animal with a veterinarian.

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    Fat-Cat is rated 4.6 out of 5 by 174.
    Rated 5 out of 5 by from Works Great! Rescued an aspca horse a month and a half ago and he's already put on enough weight that you can't see his ribs anymore!
    Date published: 2016-10-19
    Rated 5 out of 5 by from Works Great I started my filly and a mare on this as they were both underweight and didn't have much muscle development. After the short time they have need on it there is a vast improvement. I will be keeping them on it for the foreseeable future.
    Date published: 2016-06-06
    Rated 5 out of 5 by from Works great I have one horse that is a hard keeper and has skin issues. I use fat cat along with a good pelleted feed and it has helped tremendously.
    Date published: 2016-04-28
    Rated 5 out of 5 by from Best weight gain on the market. I spent 5 years tracking down a horse who was stolen from me. He was underweight when I found him, which was of no surprise because he has always been a hard keeper. I've used Fat-Cat before to help pack on the pounds when needed, it's always my go to far builder. Two months on it and he looks AMAZING, ready to start working again and build some muscle!! Definitely keep an eye on them though. If you wait too long to take them off you'll come out to a hippo!
    Date published: 2016-01-01
    Rated 5 out of 5 by from No More Lazy, Skinny OTTB We've had our skinny OTTB gelding on fat supplements for a while now and had noticed very little change. But after we started him on Fat-Cat a little under two months ago, he started gaining some serious weight (over 150 lbs.), muscle, and energy. He looks so much better, and definitely acts like he feels better!
    Date published: 2015-12-27
    Rated 2 out of 5 by from Didn't see any difference We got this for my horse who is older and having trouble keeping weight on. He's just a little bit too skinny so we just wanted to give him a little extra boost in weight with winter coming. He's been on Fat-Cat for 2 months now and we haven't really seen a difference in his weight. It seems to be palatable and he's been eating it no problem, it just hasn't helped him gain any more weight.
    Date published: 2015-12-03
    Rated 2 out of 5 by from Fat cat supplement Bought the product to put some weight on my OTTB but 10 days in and he was a raving lunatic! Took him off and promptly went back to being hisself.
    Date published: 2015-08-27
    Rated 5 out of 5 by from My first choice! I had used fat cat previously and then switched to a different fat supplement because I was given it. I switched back to fat cat as soon as I was done with the other one, this is so much better! My horse maintains his weight or gains on this, the other stuff he couldn't even maintain on. I highly recommend fat cat to all!
    Date published: 2015-07-01
    Rated 4 out of 5 by from Good muscle builder I switched from Cool Calories to Fat-Cat in order to help my horse with building muscle. It works well, unfortunately it appears my guy (a skinny OTTB) needed the fat content of Cool Calories. If it wasn't an issue of weight maintenance with a hard-keeper, I would consistently buy this supplement.
    Date published: 2015-02-27
    Rated 5 out of 5 by from fat cat My three horse love this stuff and are doing great.
    Date published: 2015-02-11
    Rated 5 out of 5 by from Cheap and efficient I've used this for two months to help rehab a young, underweight Friesian mare, and it's done wonders. She's definitely put on the pounds and it's helped her energy levels as well. Her coat also looks wonderful. Great deal for the price.
    Date published: 2014-12-15
    Rated 5 out of 5 by from Not dissapointed We feed this to our older Thoroughbred (hard keeper) and he hasn't gained weight but he also hasn't lost any so we will continue to feed it! It also has only been about a month!
    Date published: 2014-11-01
    Rated 5 out of 5 by from
    Date published: 2014-10-30
    Rated 5 out of 5 by from picky eater is happy!!! Over the past two years i have tried the Cocosoya and Gleam and Glam supreme supplements for my Tennessee Walker who is a hard keeper and a VERY picky eater. He would always pick at his food, sometimes he would eat most of it but would usually leave some in the bottom of his bucket. Im happy to say that we had a clean, polished bucket from the first night i fed Fat cat to him!!!
    Date published: 2014-10-11
    Rated 5 out of 5 by from love this product..... Thissis the second time I pupurchase this item I absolutely love it
    Date published: 2014-09-24
    Rated 4 out of 5 by from Good product I bought this a month ago and saw great results. His coat and body condition are great.
    Date published: 2014-09-19
    Rated 4 out of 5 by from Great way to keep weight on! Fat cat is a great way to keep weight on during hot summer months
    Date published: 2014-08-15
    Rated 5 out of 5 by from
    Date published: 2014-08-14
    Rated 5 out of 5 by from Love this Product I started using this product a year ago with my mustang mare. After sitting in holding pens for years prior she was in need of some TLC. This has defiantly helped in her transformation! I noticed changes in the first 2 weeks! She is now well muscled, keeps her weight, and her coat looks amazing! We have also rehabbed Thoroughbreds and i have tried countless supplements to help them keep there weight but this is by far the best!
    Date published: 2014-07-25
    Rated 5 out of 5 by from Loved it for years I fed my beloved gelding, who was naturally very lean, Fat Cat for many years to keep his weight up and was thrilled with the results. He sadly passed away from old age at 28, and I was left with a half-full container that sat on the shelf for a while as I couldn't bear to part with it. Now, one of my mares is entering her senior years and emerged from winter a little on the thin side, so I've pulled out the Fat Cat once again and started giving it to her. Like old friends, Fat Cat and I picked up where we left off, and my aging girl has filled out nicely and, in combination with a joint supplement, is moving and looking great. I would absolutely recommend Fat Cat to anyone. It's also very affordable compared to many supplements out there!
    Date published: 2014-06-19
    Rated 5 out of 5 by from It appears to working very well on my three Polo horses.
    Date published: 2014-06-18
    Rated 5 out of 5 by from Healthy weight, healthy coat. This product was recommended by my farrier for my OTTB mare who looses weight easily over the winter. I was so glad SmartPak carried it so it could be shipped with our monthly supplements. The results considering the harsh winter was great. My mare regained her weight quicker than past winters and her coat has been amazingly healthy and shiny. I have also started using it on my off the track Quarter Horse to help him retain his weight and the results have been more than satisfactory.
    Date published: 2014-06-04
    Rated 4 out of 5 by from Noticed some difference over Cool Calories My arabian was taking the max dose of Cool Calories with little weight change so I switched her to Fat Cat. She has maintained her weight well over the winter - always my biggest challenge. Between the two I believe Fat Cat was more effective for my girl.
    Date published: 2014-03-31
    Rated 5 out of 5 by from My horse has been on this product for about two months. There sure has been a great difference in his weight, coat, and overall health, and I'm not the only one that noticed. In fact, others commented on it before I even stopped to look.--Fast, easy, and effective.My horse is a picky eater--he's never left this in his grain bucket.I'm thrilled with the outcome of this product and I highly recommend it.
    Date published: 2014-01-30
    Rated 5 out of 5 by from Works great! After only one month my 25 yo TWH has gained weight, he has been very hard to keep weight on in the winter, he also has no issues eating it I just mix into his morning grain and he eats it up, he has been picky with other products. We have tried several other things and I am very hopeful this will keep him at a healthy weight all winter!!
    Date published: 2013-12-20
    Rated 5 out of 5 by from Great product for weight gain I bought this product two months ago and have definitely seen a large difference in my horses weight. Worked extremely well, very pleased with results. 
    Date published: 2013-11-20
    Rated 4 out of 5 by from Good weight builder but not for muscle gain I was looking for a way to help my 6yo Oldenburg mare gain some weight and put on muscle so I decided to try Fat Cat. After 2 months, Fat Cat did help her fill out through her mid section but I did not see a difference in her topline so I switched to Smart Muscle Mass. I am now seeing a noticed improvement in her topline, overall appearance (as she has filled out quite well over her whole body), and in her temperament. She can be a bit spooky and unfocused, so I give her SmartCalm Ultra which has helped tremendously, but I noticed that she really "settled down" with the addition of SmartMuscle Mass.In summary, Fat Cat seems to be good for putting on weight but did not help with muscle gain.
    Date published: 2013-08-27
    Rated 4 out of 5 by from Great weight builder have been using this now for about 2 months horses love it and it is helping to get and keep weight on a older horse I have
    Date published: 2013-08-22
    Rated 5 out of 5 by from Worked good I used this one a yound appendix mare I used to own, it only took one bucket of this to plump her back up to weight, she held weight nicely and she ate it right now. Simple and easy to use.
    Date published: 2013-08-01
    Rated 5 out of 5 by from great product I've only had my gelding on it for about a month but so far I like the results I'm seeing. His coat is shinier and his energy has improved as well.
    Date published: 2013-05-07
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