Looks real to me
Hi Matt, is there any way you can get a pedigree from the breeder. Your dog is only 15 weeks old now so she should "fill out" at around two, to two and a half years old. Females are generaly of lighter build than the males. Otherwise you got a nice looking pup their. People that generaly dont know anything about our Pit Bulls will refere to them as cross breeds, they dont know anything about the dogs though, so I wouldnt take what they say too seriously. Your best bet is to aquier the pedigree from the breeder.