Group

(n) /ɡruːp/

Meaning

A number of people or things that are located, gathered, or classed together.

UK ɡruːp

US ɡruːp

There are many ways to refer to a group of cats.
There are also quite a few ways to refer to a group of kittens.
No matter the size of the group though, you will always find them playing around, wrestling, chasing their tails and having an [otterly] great time.
[There's] also no single collective noun for them - if [there's] a group of otters on the water they are called a raft, but if [they're] on land they can be called a bevy, family, romp, or lodge!
A group of horses will not go to sleep at the same time - at least one of them will stay awake to watch out for the others.
They work as a group and use intelligent hunting tactics to catch prey which they would not be able to catch alone as they are faster than them.
Two or more lionesses in a group tend to give birth around the same time, and the cubs are raised together.
When the female is close to giving birth, it leaves the group for a time to give birth to its offspring, and comes back 2-3 weeks after her baby is born.
A group of peafowl is known as a harem.
While a group of any peafowl is called a harem, a group of females are known as a bevy, a muster or a party when they are in groups without the males.