Without a pedigree it is IMPOSSIBLE to know. With out an DNA it is IMPOSSIBLE for to know if your dog has any Pit in her at all. That being said, Mix or not mix, if it resembles a Pit Bull, then you need to go the extra mile and think of it as one. Why? Because if something should happen, your dog gets out, your dog nips someone, or your dog even growls at someone, your dog will be treated as a Pit Bull. Bad thing about this wonderful breed is that if it looks like a Pit Bull (What ever a "Pit Bull" may look like in a person's mind OR if it is at all "aggressive" in that person's eyes), barks like a dog, and had paws then it's a Pit Bull.