Hi There, just wanted to add this to the already posted replies you have received. It is from "Veterinary Elements". Just something else to consider if you havent already
" The stockman is seldom worried with tooth troubles in sheep,cattle and pigs, and unless well informed is apt to think horses are just as free, such, however, is not
the case. The slightest
irregularity of the teeth will interfere more or less with chewing and masticating the food, quite readily understood if a person is familiar with the arrangement of the teeth. No horse is exempt
, from colthood to old age the teeth are liable to need attention.
There are general symptoms, such as unthriftiness, often in spite of good and liberal feeding and little work, there is dribbling of saliva from the mouth,ends of hay may be dropped from the mouth, water is let fall out when drinking, the horse may crib or windsuck,
the feces may contain undigested feed, there may be swelling of the jaw, loss of flesh; the horse may pull on the bit or refuse to take hold at all........the cause is the teeth"
I thought I would share this with you. I have seen horses self mutilate( chew wire, t-posts, etc) themselves trying to get relief from discomforts caused by teeth. I am not saying this is what could be the problem, but it might help. :)