Hello and welcome! Post pictures of your pup! And unfortunately, with no papers there is no way to tell if your dog is purebred. Actually it is most likely a mix of multiple bully breed dogs and even other breeds. But it's ok! Lots of folks here own dogs of unknown orgin--mutts.
Read this thread--click here: https://www.gopitbull.com/general-dis...e-newbies.html
"It's a nokalokapoopalotadoocanidragaleashalupus. It's a breed of mixed, strained money extorted
practically useless spin off of a once noble breed." --William Williamson