Teamwork is about alignment of interests

Teamwork comes in all shapes and sizes... and species. It's about knowing that your goals are aligned and you have to cooperate to reach your goals.

For example, if you don't share the plate nicely you don't get to share in the plate cleaning. And even if you are a cat, if you've been raised with dogs since you were a kitten you quickly figure out how to think like a dog, and act like a dog so you get the same treats as a dog.