Was home for the weekend and was over to my father in laws place who showed me his stud horse that got a bad infection from a shot of Banamine. He had injected him into the muscle in the rump and it got infect bad enough that he had to have the stud at the vet hospital for a week on antibiotics.
The father in law said it was a large swollen lump and when the vet lanced it, puss shot out like a water gun across the room. The vet said that this isn't the first case they had seen like this and said that they never advise people to inject banamine intra-muscular but only orally or into a vein. I should have taken a picture of his left hip because the vets have three cuts about 4 inches long sliced open right now to drain the infection and allow air into the wound since the bacteria can't survive in an oxygen rich environment.
I had never heard of this happening before and just thought I would post something to hpefully avoid this type of situation for anyone else!
Have a great day!