I need help…

I know this isn’t a dog community, but I was wondering if someone could help me out with some advice. A breeder I bought from had purebred American bully puppies. Well, turns out, the female dog got pregnant by another dog in the same heat cycle. Meaning she was carrying a littler from 2 male dogs at the same time. I got one that was from the “other litter” meaning, not American bully they assume. They are not 100 percent sure if my pup is or isn’t. By his looks, do you think he’s American bully or something else? Just getting guesses before I do the DNA test!