Probably the most important question to ask is, Can we see your home? If a breeder will not allow you to see where the pups were born and taken care of, you need to run, run away. You also want to see the dam and the sire, sometimes the sire is not on site, if this is the case ask for pictures of the sire. Ask who their vet is, you can talk to the vet and see if he/she has any concerns about the breeder. Ask for the pedigree and ask about the registration. Will you get full or limited registration. Do you have breeding rights. Ask what they feed their bullies as well as the pups. There are tons more, but you will be able to learn a lot from these. You can bring the answers back to EBN and someone will be able to tell you if your breeder is reputable or not.