vet also suspects abcess due to something like thistle or other foreign particle in hay, ground bee sting, etc. however, could be something else more involved like a sarcoid or something horrible like that. problem is a biopsy is needed and sometimes cutting into something like that makes it far worse. so for now we are treating like an abcess. none of the other horses have anything so I don't know about the hay containing something. there is no swelling on the outside of mouth, no temp, eating just fine, etc. this is an old retired rescued horse - he hasn't done anything in 9 years so no worries with riding him and having a bit in his mouth. he loves his wet hay and wet grain, is able to easily eat carrots and apples so he thinks life is still ok!
any other ideas?
others who have seen something like this - was it this big? this is huge!
I have a photo in a book that looks very similar to that. Its from a Bot fly. Do you get bots in US? Have you wormed with Ivermectin at all? If not might be worth worming him. I will send the pic to The Jenners (hope thats okay The Jenners) as i can't private message because of the adverts!
wormed with zimectrin gold on sunday, which was dumb cause now I have to wait to do fecal! but their fecals always come back negative - I haven't had positive fecals in ages, although I do worm as vet recommends.
have been putting regular ivermectin on sore. it seemed to irritate it - became more red and bloody. should I expect that?
I don't know that the horse would necessarily have an intestinal bot problem if the sore is due to a bot fly. I'm thinking the sore would be caused by a bite or even bot fly larvae right inside the sore.