I once had a vet tell me my mare had a tumor and it needed surgically removed. Said vet glanced (yes, glanced) at my mare and then somehow came to that conclusion. The lump was a small hematoma that went away on it's own. The same vet that also told my friend her mare needed hock injections. The mare was stocked up from being stalled for a week due to flooding. A vet from the same practice also told me that I didn't need to do anything with my horse's legs when she gashed them open. He said "maybe cold hosing", yet her legs had gashes each about 6 inches long and 1.5 inches wide. He refused to sell me bute or vet wrap (I had ran out and couldn't get to the store for a couple days).
With my other horse, the same vet apparently went to float her teeth (sedated her and all) and then said she had no teeth. 11 months later I had the mare above done by our now vet, decided we should look in pony's mouth just to check up and make sure everything else in her mouth was okay. Turns out she has a full set of teeth, and was WAY overdue for a float. Needless to say, I'm extremely peeved by this "vet". I haven't used said vet in over a year now, and never will again. He is not somebody I trust dealing with my horses.
I have also been told by numerous people how "hot" my 6 y/o mare is because she runs in the field when she is turned out. Yup, that seems about right
Really, she's the farthest thing from being hot. My pony is the hot one, lol.