Most breeds of dog have 16 toes, as each paw has four toes. Certain breeds can have an additional toe on each hind foot, called a dewclaw. Dewclaws appear on dog breeds that were historically used for guarding flocks, such as the Australian shepherd and the Rottweiler. read more
If they have more or less it won't hurt them. Dogs usually have 4 finger and a thum on front paws and only 4 on their back paws. If they have more or less it won't hurt them. read more
Humans have 5 toes and so do bears, primates, weasels, bats, and several types of reptiles and birds. Some animals such as dogs, foxes, wolves and coyotes though have though four fully functional toes instead of five. read more