ok I hope I am a member but if I am not please delete and I will apply. This is the third mini I have owned, never had any issues with the other two. This little guy is 34 inches and I did get him from an auction. He appears fat and sassy- loves everyone and appears healthy. When he got here his manure was green and runny. We kept him off the grass and gave him hay in addition to cutting the grass down very low. His poop then turned to brown and typical for a horse. I wanted to worm him but wonder if I should wait until we see if the black stools cease. Please anyone with info please answer. As I know black can signal ulcers or unhealthy diet. We have been giving him a handful of horse feed - in pellets.