Answer on @Quora by @AdrianaHeguy to What is this type of dog called? – Xochielt Sanchez
Answer by Adriana Heguy:
It's a pit bull mix, or "backyard pit bull", meaning it could be mostly or all American Staffordshire Terrier (Am Staff) but it has no American Kennel Club papers. It's the most common type of dog in American shelters. This one in the picture is what some call a "red nose pitbull".
I have two pit bull mixes adopted from NYC shelters. Don't worry about the kind of dog it is, worry about its personality if you want to adopt her. Many are very gentle, like the one you describe. Others are not.
If you're interested in pitbulls, you may want to read my answers to these two Qs: