has anyone had a problem like this? My 22yr old morgan gelding suddenly started losing weight and having constant diarrhea after turnout this spring. No toxic plants in pasture. My vet took a blood sample and can find nothing wrong. The horse wont eat either. He has been wormed taken penicilin and mendazoale in case there was contaminated water. He doesnt have a temperature either. Strangely he cant get enough salt lick. We had to take it away from him. Up until last fall we had other horses with him for the last 20 years, and this is a new one on me. My vet is stumpted as well. Any help would be appreciated.