So what is responsible? Raising a massive litter, taking all goodness out a bitch that not only works for you but produces your next dog, for you to be lumped with pups,putting them on gumtree or pre loved selling to folk you've never met only to never hear off them again? I'd toss and turn all night for months..... pan half, put all your efforts into getting the other half the best homes possible and sleep like a baby.. just my take on it, but what's responsible? As surely as soon as that pup your responsible for leaves you'll never see it again in majority of cases...