Best way to fatten up a horse?

Supplements, supplements, supplements! You can't just give a horse lots of food; they could founder or tie up depending on what you do with them, or just simply become unhealthly. What you want to do is use weight supplements; they will help in a healthy way. You can also give them a good amount of food, just not too much as I said above. You should probably consult your vet about a sound amount. Hope you have luck with fattening her up! xD

If you're not already giving her some grain, I'd get her a good quality sweet feed and start graining her a little bit twice a day. Maybe start with 1 pound twice a day. You could also put a little vegetable oil over it too. Start with 1 ounce each feeding. I buy my vegetable oil at the grocery store - it's just soybean oil. I think that's better than corn oil and my horses like it better. Whatever you choose to do, do it in moderation. Too much too fast isn't good for a horse and can create health problems like colic or founder.

I have always used beet pulp to fatten up my horses in the winter when hay is not the best. Another thing that I used for my ponies was alfalfa it is hotter then hay. You can try upping the sweet feed intake, but not by much.

Vegetable oil works great. I think there is about 2000 calories per cup or something like that. Start slowly or they will get the squirts. So my recipe is free choice grass hay, rolled oats with corn oil. I have had horses that I had to feed two cups of oil a day. It did the trick though. Don't waste your money on the commercial fatteners. They just add fat to the ration and you can do that with oil.

I think that the best way to fatten a horse is to use beet pulp. I think that the vegetable oil would likely work, however the beet pulp has more nutrients to support overall horse health ( www.platinumperformance.com )