Biting dogs is quite a problem. I was attacked by a friend's rottweiler when I was a little girl. He tried to tear out my airway. Since then I have a terrible fear of big dogs. After I got married, my husband got us a German Sheppard, I was a little skeptic at the start, her being a big breed after all , but she turned out as the friendliest dog ever, and she is amazing with my children. about two years ago, we got another German Shepard, He and my son are inseparable. They sometimes tend to take you by the hand when they want to show you something, but they have never bitten anybody, and even play with my cats.
I had a Boerboel Foxhound cross that was another story in its entirety. We lived in a security complex and the kids in the complex teased her over the walls and threw stones at her. This made her very aggressive towards children. when my daughter was born everything went well until she started crawling. The dog started growling at her and showing her teeth. One day, she actually bit my little girl in the face for na apparent reason, my girl had to get stitches. I just could not get myself to have the dog put down, because some irresponsible human kids damaged her psychologically. she now stays with an old lady in a retirement village and they are fast friends. I visit her from time to time and she seems really happy. There are no kids around to bully her or make her feel uncomfortable.