That is one of the most horrid things you may have to do in life. After your always second guessing your self, to early, left to long, geeezes. I hate it & hope that I never halve to do it again!!!!!!!! It's bad enough at the vets but when things go down hill fast at home it really sucks the big one!!! So sorry for you & your wife. Many dark days ahead. Try & keep really busy after, helps keep it off yr mind a bit!! So so sorry. Bill out. 👣🐾👣🐾🇨🇦