Hungry Rat of the Ocean

Cats, Rabbits and Guinea Pigs you control have protection from Rats. (They can’t be blocked, targeted or dealt damage by Rats.)
At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch.
Whenever a Rat dies, put a +1/+1 counter on
each Cat, Rabbit and Guinea Pig you control.