The pit bull is a dog historically bred from the terrier and bulldog breeds. There has been controversy in the press surrounding conflicting studies that claim pit bulls may have a tendency to cause an increased number of bite injuries. The pit bull breed has been featured in news stories for working as service dogs and therapy pets. In some cities, restrictions have been discussed that would ban pit bulls within the city limits. There are several famous pit bulls, including the Cesar Millan’s pet named Daddy. Pit bulls have been noted for heroism and are frequently in news headlines for saving their owner’s lives.