Terriers can also be dangerous with small furry creatures, from cats to rats. They were bred to kill vermin and catch other small prey animals such as rabbits. They are passionate diggers and will journey down rabbit holes in pursuit of prey. Some terriers are considered untrustworthy in homes with cats and other small animals. However, with training and socialization most terriers can be trusted with cats.
The terriers include the Norwich terrier, the Border terrier, and the cairn terrier, as well as the larger Airedale terrier. There is also a bully breed among the terriers including, Staffordshire bull terriers, bull terriers, and American pit bull terriers. All of these breeds were originally ratters, but they were also used in other bloods sports, including bull baiting and dog fighting. Because of this background, there are concerns about their temperament. Bully-breed owners, argue that most of the breeds are extremely people-oriented and good with children. However, they are not always good with other dogs. Owners of terriers are encouraged to give training and socialization to make the dogs comfortable around other canines.