Last summer, one of my horses was hospitalized with a severe case of diarrhea. He was tested for salmonella, Potomac Horse Fever, clostridium - nothing came back positive.
The final suggestion was that it was either a reaction to stress or a reaction to something toxic he had ingested.
The only thing - we had just opened a new sack of "funny looking" beet pulp.
The horse recovered, but I never could bring myself to feed out that beet pulp, although I still do feed BP.
Do you think the beet pulp could somehow have been the culprit?