There are a few reasons why big cats huff. The first reason is to show their dominance over other animals. When a big cat huffs, it's a way of saying I'm the boss around here! Big cats also huff when they're feeling threatened or scared. It's their way of trying to intimidate whatever is making them feel that way. Finally, big cats huff when they're just plain old angry. If you've ever seen a lion or tiger at the zoo pacing back and forth in its enclosure, chances are it was huffing out of frustration!