Koko, the first gorilla that uses sign language to communicate with people, has fostered many feline friends in her life. Her first feline buddy, All Ball, a lovely kitten she named because she looked like a ball to her.

A few weeks ago Koko was introduced to several lovely kittens from the Humane Society.

"Koko has always been very affectionate toward kittens (remember All Ball on the 1985 cover of National Geographic) and still entertains them as guests from time to time. In this clip she receives a visit from 5 kittens (thanks to the San Francisco Peninsula Humane Society).

She picks a winner ("Tigger"), but will she invite Tigger to stay?"

Click play to watch this cute video: