Well the best thing to do is go with your gut feeling. If something just doesn't feel right or look right, it probably isn't. Look around, the place should be clean and smell clean. Pups clean and mom and other bullies look healthy and have a good disposition. If they keep them outside it's usually a bad sign. Some big breeders will have a separate building for their bullies, and that's OK, as long as it has A/C and heat, and is clean. Most will take a deposit and only give a receipt and that is normal. The breeders that don't let you come to their house and inspect the place and see their breeding stock, I would stay away from. I hope this helps.