My vet wants to kill one of my cats. A feral cat got in and fought with one of my cats Thursday night. Now he is testeing positive for FIV..I can't believe the virus would show up in 3 days. Therefore I think he has had it awhile. I have 12 other cats and everyone has been in the same house. This cat has lived with us for over 1 year. Has anyone had any experience with FIV cats. I understand that, with proper treatment, they can lead pretty normal lives. This vet's only response is to kill the cat. She did this last December to an outdoor cat I was trying to adopt. Any advice, experiences or help would be greatly appreciated. Thanks, Anne