i am guessing he is in a lot of pain
it sounds like back to the vet for you
also perhaps one of those inflatable collars would work better
Honestly I don't think he is. He's running around all the time wanting to play outside, laser, etc. It's just when its medicine time and now with the collar being on, he's getting very agitated and growling a lot! Understandable, but not sure how to approach this.