yeah, mine was a full grown male pit bull named Major....a drunk pizza hut delivery guy came to my gate one night looking for a house and Major grabbed him by the arm "Fred Flinstone" punched his arm with 4 holes and almost flipped him head over heels into my fenced yard!
Total black and blue bicep with dark blood oozing out all four holes from his teeth within like 5 minutes....lucky I had a sign up...
I was going to ask what a sign up was, thinking that you signed up your pit bull somewhere, then I realized thou meant a warning sign. We put a fence up too all around the property. Not to keep the people safe, but the dogs.
At one time we had two Dobies. I don't think a sign would be enough here.
Never had a dog bite though. Pit bulls can be great dogs if loved and treated well.