I had a dog once that had rabies, and I didn't know about it. Woke up to my little bro screaming and Jack trying to bite him. Had to kill Jack with my SOG knife :'( I had to protect my bro :/ Just be glad you didn't have to kill him :/
Oh man that sucks. my cat who was 18 had problems with her back...she was always lieing against something. she died two days later. it sucks, but it will be fine. we have a cat now who is a spitting image of Shelby(my old cat.RIP.) he is so funny.he is lying on a chair sleeping like he almost never does. He will never replace Shelby, but he can try. Good luck and RIP.