I don't want to get involved, but I want to say one thing. I don't know about this particular situation, but I do know that some shelters will let you 'exchange' a pet. When we adopted Roscoe, they told us that if he didn't work out we could bring him back within 30 days or something like that and either give him back or choose another dog. They want to make sure that the new pet fits in well with any other pets and kids/people in the house. Now, I don't know anything about exchanging a pet that was not previously in the shelter, but I would imagine that they would do it. Just IMO. Good luck!