Have you ever owned a pit bull?  They are sweet dogs, but they get really big.
Yes, I actually have two American Pit Bull Terriers!
Pit bull
as "pit bulls" by shelters. Many of these breeds were originally developed as fighting dogs from crossbreeding bull-baiting dogs (used to hold the faces and heads of larger animals such as bulls) and terriers. After the use of dogs in blood sports was banned, such dogs were used as catch dogs in the United States for semi-wild cattle and hogs, to hunt and drive livestock, and as family companions. Despite dog fighting now being illegal in the United States, it still exists as an underground
locking mechanism" in the jaw muscle and bone structure of pit bulls or other dogs. Pit bull-type dogs, like other terriers, hunting and bull-baiting breeds, can exhibit a bite, hold, and shake behavior and at times refuse to release. Pit bulls also have wide skulls, well-developed facial muscles, and strong jaws, and some research suggests that pit bull bites are particularly serious because they tend to bite deeply and grind their molars into tissue. Breaking an ammonia ampule and holding it up