Jan did they give him any pain meds? If not you might try giving him a bit of aspirin. I know I'm talking to an expert here but just in case you didn't know. Our vet told us we can use about a 1/4 of an aspirin every other day for cats. I've done it many times and no harm. I found the best way to give it to them is to crush it and mix it in a tiny bit of water and then pull that into a syringe. It's breaking my heart just thinking about the pain he must be in and no meds. So many vets won't give pain meds but since he had more than the nueter then I think they should have given him something. Bless his heart. I'm praying for you and for him. I know it has to be awful for you to watch.