There are several kinds of collars that you can use on Mowgli. The ones that tie are my least favorite because cats can work them off. Ask your vet about a collar that has snaps on it. They're next to impossible for a cat to get off. My RB Peeka had one when she had surgery and she never was able to get it off. I know how much they hate them. Depending on Mowgli's personality, you may be able to remove it while he eats and drinks if you're sure he won't bolt as soon as he's finished. Maybe the width of the collar is too big also. I'm sure your vet can find something that won't drive the poor boy (and you) crazy. Good luck and we'll keep those prayers going......