I'm another who always goes in to see the cats at PetsMart even though I can't take in any more. Although, that's what I thought this time last year when I stopped by and ended up adopting a senior Siamese cat whose owner had become too mentally ill to take care of her. She was very, very stressed out, thin from refusing to eat much at the shelter, and initially with me, and biting me whenever I stroked her. The chaotic turn of events in her life, removal from a home she'd known for over ten years to a cage in a noisy shelter, then a cage at PetsMart, all that was apparent in her behavior. Once she was established in my home, she blossomed rapidly. Fortunately, she was a cat who didn't need to be an only cat because I couldn't have taken her if that had been the case. So, for me also, it's the seniors who need "only cat" homes that depress me because their incarceration in a shelter is so much worse for them, and their chances of a home are less.