Hiding Cat

Cats are known for their cleanliness, spending many hours licking their coats. The cat's tongue has backwards-facing spines about 500 micrometres long, which are called papillae. These are quite rigid, as they contain keratin. These spines allow cats to groom themselves by licking their fur, with the rows of papillae acting like a hairbrush. Some cats, particularly longhaired cats, occasionally regurgitate hairballs of fur that have collected in their stomachs from grooming. These clumps of fur are usually sausage-shaped and about two to three centimeters long. Hairballs can be prevented with remedies that ease elimination of the hair through the gut, as well as regular grooming of the coat with a comb or stiff brush.
Fighting
With domestic cats, males are more likely to fight than females. With feral cats, the most common reason for cat fighting is when two males are competing to mate with a female: most fights will be won by the heavier male. Another possible reason for fighting in domestic cats is when the cats have difficulties in establishing a territory within a small home. Female cats will also fight over territory or to defend their kittens. Spaying females and neutering males will decrease or eliminate this behavior in many cases, suggesting that the behavior is linked to sex hormones.