My sister finally decided that she has to put her cat to sleep and it is really sad because he is such a nice cat. He has some kind of mouth disease I think, but I am not sure exactly what it is. She has had him for the past 9 years and he is one of the nicest cats that our family has had. I know that it is his time and I accept it, but she is very very sad and I think she wants to change her mind about putting him down. Why do we invest so much emotion into our pets?