My horse was excessively drooling today. Any idea what that is caused by. I had just given him a flake of alfalfa right before we got him out in the arena. We're training for an upcoming endurance ride and he looks thinner. Wanted to give him a little extra.
At first I thought he had something wrong with his mouth, hay caught in the bit. That wasn't the case. No choking but was mouthing the bit which he never does. Took the bit out, no problem except for copious drooling. Then put the bit back in. Rode lightly for 15 min then quit.
He had poop in his stall and pooped in the arena while riding so I don't think it was colic but was worried about that. Any ideas? I later noticed a moldy flake of hay in the remaining alfalfa. If I did inadvertently give him a flake of moldy hay could that have caused the drooling? What else could it cause?
Could it be related to his increased workload?
Would appreciate any recommendations, thoughts or advice.