A housemate began to foster two 11 week old puppies with the intention of keeping only 1. After a few days, I realized I wanted to adopt the second one (they're sisters). She has been caring exclusively for the pups for over a week now and they are closely bonded with her. She's doing a great...

If a dog is fostered and then adopted, and the adopter returns the dog due to whatever reasons - is it true that it's better for the dog to be returned to the original foster as opposed to some other foster? Like, the dog establishes a close bond with the original foster, then leaves the...