So the argument is that, given a choice between sibling and non-sibling, a dog will always choose the non-sibling? That's the implication of this response.
I suspect so. But, I might temper that to say "non-domesticated animals." Whatever we've done with dogs, they're no longer a product of natural evolution.
I just think we should suspend judgment on Boris until we have all the facts through an inquiry, police investigation, and parliamentary commission...then we should explode him.
also,
I'd like to be called Lord Poopy His Most Gloriously Excellent.