Weasels are small mammals that weigh anywhere from two to twelve ounces. Despite their small size, these animals have a reputation as fierce and tenacious hunters. Their diet consists of many animals as large or larger than themselves, including rats, rabbits, birds, and gophers. In general, weasels are not dangerous to people and usually avoid human contact. However, they will defend themselves against pet dogs and cats using their sharp teeth. Like most wildlife, the pests may also bite people if threatened or trapped.