Animal Care and Control here has a program called "Seniors for Seniors", where seniors can adopt a senior pet for very little money. I can't believe they would tell her she's too old! That is definitely age discrimination and I would call them!
One of the things I'm looking forward to about retirement is being able to have a few cats around me, I can't even think of how upset I would if someone refused me that!
Funny how the shelters hate that people don't care to adopt their "senior" cats yet they (at least this one in particular) does not want to adopt "to" a senior.