Hi Sarah. I think your friend posted in general and if that is the same dog it was mentioned that she bit a person. That is pretty much a death sentence for a pit bull.Do you have details on the "bite"? Was it an actual bite or that was an added made up excuse to return the dog? Was medical care necessary? This is something you need to find out because to pull, adopt out or release a dog with a bite history can be a liability, especially if the dog ends up in clueless hands. If this bite did not actually happen the way it might have been described what you can do as a trainer is to write a formal assessment on the dog, based on your experience with her and your knowledge of dog behavior, and give it to the shelter manager. It can't be something like "the dog was nice to me" but a credible statement that clearly says you know what you are talking about. Keep in mind though, that if you vouch for a dog to be adoptable, you must make sure there are no red flags that make an adoption unsafe for someone. I am not talking about dog to dog aggression but other behaviors.