Once you have adult Cats in your pool, you may choose to play either a Cat or a Kitten on your turn. Cats work the same way as Kittens in all respects, except that Cats CANNOT be booped by Kittens. However, Cats can boop other Cats, as well as Kittens.

When you line up 3 of your pieces with combination of Cats and Kittens, you still remove all three pieces from the board and graduate any Kittens. The Cats in the group go to your pool, as do any newly graduated Cats.

It’s okay if Cats are part of your line of three. Remove all three from the board. Here, both the Kittens graduate into Cats - and are placed, along with the Cat from your line up, into your pool.