Today when i got Dash out of the paddock i noticed that he had a fairly big quantity of white-ish discharge coming from his nose, he has been off his feed for the past 2 nights and has had pretty bad diarrohea for the past week (thats clearing up now). He dosnt feel right to ride and is very sluggish. Im not sure what it could be? I was thinking the diarrohea was from the new grass shoots in his paddock and the new roll of paddock hay we just got on the weekend. Any ideas on what might be the problem? Do i need the vet? thanks!