Yesterday my oldest son brought his best friend Happy to be neutered, Happy was one year old. Happy came through the surgery well with no known complications, about an hour later the vet called again to say Happy passed away from an allergic reaction to the anesthesia. I have looked today to see what the chances are of this happening and it seems this is a very rare occurrence. My son is devastated, the two of them were truly best friends. Happy was a beautiful soul and a wonderful friend. We are a family with 10 cats total and they are a huge part of our lives. I just needed a friendly place to talk a little and I found this message board so I hope my rambling is taken from where it is coming from. My son does have another cat Tommy as well so he is not alone. Thanks to anyone out there that may respond.