It really depends on the individual rescue group, although most are very thorough in screening and placing dogs.

All of the rescue groups (cat and dog) that I work with do home checks, vet checks, and personal references along with the normal application. They also make sure the animal's needs are met in the new home and its a good match.

I think if you know a little about rescue groups, its very apparent if it is a good or bad one. Contact them to see about meeting some of their dogs. You will be able to tell fairly quickly how well they screen, etc.

I feel bad for the woman who adopted the Chow. I'm very glad she's exploring other rescue groups for the poor sweetie.