My poor little basset hound must have been stung or bitten Sunday while I was away at church. I have a dog door so he comes and goes from the house to the fenced yard at his leisure. His muzzle has swollen to twice its normal size. I gave him the usual benedryl dosage (1mg per pound) and watched him closely. He is uncomfortable for sure. I can't find any wound on him, no puncture holes of any type. This has happened to him once before, several years ago. His eyes swelled shut that time. I have continued the benedryl every eight hours. I took his collar off immediately in case his throat swelled but it didn't. He has eaten and even scrounged around the baby's highchair looking for scraps, so he isn't too bad off. Sure wish I knew what did this to him. So sorry about your doggy who didn't make it. We will join them all in heaven someday, I am sure.