This shouldn’t be fed if on pasture or short rich grass. The high protein in this can make them insulin resistant and founder.If they’re on hay only and need top line or weight this is fantastic.If they’re over 4/4.5 ( good condition)on the Henneke scale they don’t need it.My easy keeper IR cresty gelding I believe adding this tipped him over the edge and he suffered some laminitic flare ups.remember if the crest is hard so is the digital cushion inside the hoof, they are very similar tissue. So ALWAYS monitor crests and never feed this if crest is the least bit hard, they’re on green grass ( lots of protein already) or they don’t need top line. Otherwise it’s basically a protein/insulin OD resulting in painful founder, swelling, tender feet, puffy eyes etc.For hard keepers, thin or emaciated horses, horses in hard training or need top line filled in on hay this is great stuff. I mix it with beet pulp, hay pellets or senior depending on the needs of animal . Add water and feed in these tubs so they eat it. Most will after a few days of gradually adding it starting with just a pinch to a tsp to a TB to half scoop etc.I’ve had 2 rehabs come in recently a terribly foundered 10 yo pony with P3 poking into and through her soles scheduled for euthanasia. Probably a 6-6.5 on Henneke scale, only a tiny bit cresty. She was muzzled with a blocker and cut waaaay back in protein and diet addressed and hooves trimmed waaaay back so they could grow in correctly and put in a very minimal diet to lower her insulin level and get her to a 4 on the Henneke scale. After a few weeks we added this to her hay pellets and it helped bring her into condition and grow in beautiful coat, thicker tail and lovely strong hooves. Within 4 weeks we could ride her in a fluffy soft ring happily, 4 months her hooves were grown in through the heel and she was sound barefoot on soft ground ( riding ring, grass pasture etc) in 6 months jumping and teaching kids again.2nd case was a starved miniature donkey, skin and bones. Maybe a 1.2 on the Henneke scale. She would exhaust herself even chewing a few handfuls of grain or 1/4 lap and trying to digest food and have to rest. It was so sad.A few more days and she’d have been a downer. Wormed her and add Half scoop of Tri aminos to 1lb senior feed she can take a half hour to finish and free choice hay and in 3 days she had more energy, 3 weeks there is a little meat over her ribs and below her back bone. Maybe a 2-2.5 on the scale and she’s eating in normal time now.. By 3 months I think she’ll be a good weight. I’ve rehabbed well over a hundred horses and Tri aminos speeds up the top line and muscle building capabilities to grain. However I caution again about feeding it to easy keepers or horses in good weight. The protein in it can cause an insulin flare up and founder. Feed to horses that need weight, are under muscles, on hay or dry forage only or in heavy work. Not the fat companion horse grazing in your backyard.