That's what the rescue centre used to tell me Kat. I felt really sorry for the older cats and could happily have come home with them. I just knew it was unfair to my old lady who hated other cats (including my other cat!!!!).
My next door neighbours annoy me. They rehomed one of their cats just as he started to have problems, subsequently got rid of two others, which really were lovely cats. They still have one but I don't think they care about it because it is always here. If it wasn't for the fact that it is HORRIBLE to my baby girl I'd give it a home.