The family Canidae forms a diverse group of members and they include wolves, foxes, jackals, coyotes and dogs. Canids have a worldwide distribution except for New Zealand, West Indies etc. The domestic dogs, however, have been introduced in many places where wild canids are naturally not found. The members are adapted to a wide variety of habitats ranging from desert to arctic tundra region. Their size varies from the smallest fennec fox weighing about 1 kg to the largest grey wolf weighing 80 kg. Canids are easily recognized by their long muzzles, erected and pointed ears, strong and blunt non-retractile claws, more or less bushy tails and well developed jaws. Canids walk on the toes of the feet. The male has a well developed os penis. All the canids are reputed for their opportunistic and adaptable behaviours. They tend to hunt in pack. Some canids such as arctic fox and timber wolf are important for their fur production. Canids in their natural state prey deer, hare, wild pigs, porcupines, rabbits, beavers, mice, birds, crabs, fish and carrion. The captive animals do well on a mixture diet based on minced raw meat, dog meal, powdered bone meal and cod liver oil with supplementation of milk, vitamin D and calcium.