Play growl/noise okay?

Did some searches, but didn’t quite get the answer I wanted. Quick summary, girlfriend has dog, and got freaked out a bit when she realized she adopted a pit bull (mix I think). I put it in my hello post, but essentially, found a dog at shelter, thought he was so cute, they told her it was American Staffordshire Terrier, and I told her he was a pit (I was away for about 3 weeks when she got him).