I have a 8 year old Paint gelding. Since February/March he's been consistently underweight. I've took his manure to the vet to check for any kinds of issues but they have all came back negative. The vet seems to think since he was kicked by a Shetland pony & has a small blind spot, & that I sold his "best buddy" horse, that he is stressed. I've been putting him out on pasture alone during the day, he's fed once in the morning, put out to pasture, brought back up at night, fed again, with hay throughout the night as well(just the past 3 days since the last vet visit). I would say he is a 6, low 7 on the body scale. He is wormed regularly, & like I said, he has been vet checked twice this year to make sure he wasn't sick or anything. Are there any feed that will speed up the weight gaining process? Any supplements? Thank you!