My neighbors have a Pitbull/German Shepard mix puppy. They can't afford to pay for it, so I have offered to take it instead. Though talking to my father, he said it wouldn't be a good idea because that mix of dog is dangerous, especially if you're trying to start a family, like I am.
I already have a red nose pit and she is very territorial when it comes to the puppy being around me and has already snapped at the puppy several times. Though when it's just them my dog has no problem with the puppy.
I can't find much research on that breed of dog being bad, but I would like to get some feed back on if I should take the puppy or not. We have the means to take care of her and train her, but I don't want to regret it in the future.