1. If a big cat is unfamiliar with a kitten, it will regard the kitten as an enemy and bite it.

2. The big cat’s desire for control. A big cat biting a kitten is declaring its status as the big brother and its control.

3. Big cats are very territorial. When a kitten infringes on a big cat’s territory, it will bite the kitten.

4. Big cats are very jealous and do not want their owners to pet the kittens, so they will attack the kittens.

5. A big cat biting a kitten may also mean that the cat is learning hunting skills. The big cat occasionally bites the kitten while playing.

6. If the two cats are of different genders, it may be that the older cat is in estrus. The female cat should be fixed by biting the neck of the younger cat to ensure the smooth completion of the mating process.

What behaviors between cats indicate friendship:

1. Smell each other’s scent. Each cat has its own different pheromones. When two cats slowly get closer, they will smell each other's scent to determine whether the other's information is compatible with their own.

2. Rub each other’s bodies. If two cats have a good relationship, then the two cats will continue to rub each other's bodies to express comfort or express love.

3. Cats share litter boxes. If two cats have a good relationship, they will share a litter box together and even be willing to help each other bury it.

4. Express through calls. Cats express their feelings through meowing. If two cats have a good relationship and are familiar with each other, then the meowing will tend to be coquettish and soft.

5. Lick each other’s fur. In cats' subconscious minds, generally speaking, only cats with high status and relatively powerful status are qualified to lick other cats. Licking each other's fur is a sign of friendship.