I haven't read all the posts but I had my previous horse's teeth floated and he did fine. The vet did the floating, and he gave Dom. a mild tranq. Just enough to calm him so they wouldn't be doing a battle, and he wouldn't be spooking in the middle of the float

. Domino was fine, he had no problems, the tranq. wore off after about two hours, he wasn't sedated enough that he couldn't walk, he was just very happy and relaxed

. He had several bad teeth - one was so long it was almost punching into the roof of his mouth. He ate his supper that night super well - no quidding - and instead of it taking three to four hours to eat, it was gone in about one, (maybe less???...) He was a very happy horse. When I reached into his mouth I could feel several teeth which were not even, were too tall, and one that was crooked. They were fine after the float, even the crooked one seemed to straighten out a little

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I wouldn't be worried, I monitor Christy's teeth monthly, and have the vet check when he is here twice a year. When she needs it, she will get floated.
Connie and Christy