i am glad you guys pulled of this undercover operation as what a cruel existence she was living. The brains in the mixed breed is definitely the Labrador. I have a chocolate brown one and she is no dummy. They are used as rifle dogs to go and fetch whatever has been shot which is normally birds as they swim like a fish. My one has webbed feet and made sense why she spends hours in the pool everyday.
yeah, i have seen Labs mixed with pretty much whatever and they normally end up being pretty clever animals.