From personal experience I had a friend who raised a pit bull from a puppy and his dog was well behaved and trained well. Then when the dog was about 5 years old, it just snapped one day and attacked my friend mauling my friends arm in his bedroom. When he got the dog into the back yard it started ramming the glass door with his head and then ran and scaled a six foot wall and took off never to be seen again. I knew this dog as a puppy and how it was raised. This was also in Arizona, where the vet said they have cases of pit bulls “going crazy” from the heat but ever since I have been wary of pit bulls.