I recently purchasd (about 2 weeks ago) an OTTB whose last race was July 11, 2008. I have noticed that his stool resembles the consistency of cow patties...somewhat loose diarrhea. I initially suspected stress/diet change to be the cause, but when I called the woman I purchased him from (who has known him his whole life) said when she had him laid up at her farm 6 months ago he had the same type of stool, and he had this same kind of stool when he was at her farm waiting for me to pick him up. He is dropping weight and I can see his ribs/hip bones. I presently have him on Trotter/Pacer mixed along with nice green hay (not sure whether it's got alfalfa in it...have to ask the barn owner). My suspicions as to the cause of his cow patties are: ulcers, worms, hay, hay stretcher, needs probiotics and lastly maybe he has a bacterial infection in his gut. My plan is to put him on probios, electrolytes and Ulcergard. I just picked up Omeagtin to wean him onto in place of the sweet feed and I'm going to give him more hay in place of the hay stretcher.
I've never encountered this type of ailment in a horse before, so if anyone has any advice or experience with this type of thing I'd appreciate some advice!