Animals

Grooming begins at the moment of birth. Immediately after delivering their litters, both wild and domestic females lick off the layer of membranes covering each cub or kitten, simultaneously cleaning and warming the newborns. By 2 or 3 weeks of age, the youngsters have the physical skills and the motivation to groom themselves.
The papillae-spiked tongue is a feline's primary grooming tool. The moistening saliva and rough tongue work together to scrub and align the hairs of its coat. And thanks to the incredible suppleness of its spine, a cat can lick almost every part of its body, except for the head and face. To clean these places, cats lick their paws and then rub them over the face and head. If frustrated by a particularly rough, sticky or dirty patch on its coat, a cat may resort to using its teeth to tear or bite off the offensive material, along with the hairs. As a consequence of all this grooming, felines ingest a considerable amount of dead hair, which they occasionally vomit as hairballs. Longhair domestic breeds are prone to impaction of hair in the intestinal tract and may need regular doses of a hairball remedy to avoid serious problems. Frequent grooming of both longhair and shorthair cats by their owners helps to prevent problems by removing loose hair before it is swallowed.
Grooming also regulates body temperature.