Besides a Vet? Hes been seen, hes 17 months old, resently gelded and I told him about it and he really just kind of blew it off. Told me to give him peptol bismol. It works a little, but not really. I have 8 other horses, of all ages and this colt's half sister. Raised most the horses from weanlings... I've never seen this. Yes they are wormed, shots, coggins, fed quality hay and grain and have grass. Colt seems a little down in the dumps since being gelded, but he had the poops before that. Just wondering if anyone has dealt with this and may have a suggestion? Thank you!