having to keep marine mammals in captivity. Pet shows Dog shows, cat shows, hamster shows, and rabbit shows are exhibitions for breeders and breed enthusiasts. The Westminster Kennel Club Dog Show has been held annually since 1877. Over 300,000 dogs were rated by 134 judges in 134 shows through 2011. Promotional exhibits Animals are sometimes used to attract business to a commercial enterprise, such as a bear at a gasoline service station, a monkey at a trade show, or an elephant at a shopping center. These animals are typically displayed but might also perform in a show. Rodeos Farm animals and horses perform competitively at rodeos. Zoological parks Modern zoos often include animal shows for educational purposes. Petting zoos and roadside zoos are commercial enterprises that typically only display animals. References Animal shows