Animals communicate with a language of their own. I have one parrot that squawks if I'm at the other end of the house because he thinks he's being left out. Cats purr when they're happy and hiss when they what to frighten us. Dogs wag tails, bark, whine, snarl and bare teeth.
Write a scene involving an animal trying to get a message across to another character (animal or human).
(For those of you old enough to remember: Think of how many times Lassie saved the day! Or in the same era, the horse Fury who also saved the day. Or, Rin Tin Tin!)