Our PetSmart adoption area, the animals are from a rescue group that fosters only. Man source of animals come from strays and ferals but they do get surrounders. They were ones help us out with Cindy.
They rotate the animals from fosters homes (give them a 2 week stint at PetSmart). There are two (sisters) older that must go together and everyone loves the one but the other is not social at all. I've meet the two sisters and agree one is a doll baby the other is mean. They continue to live at the foster home maybe someday they will both be adopted. The foster mom who keeps them wont split them up.
We adopted older cats through PetSmart, Thumper 2 yrs old & Eleanor was 3 yrs old. I take that "we adopted" back.... They adopted us