How do rabbits get stress?

Rabbits are stressed out by fears and feelings of insecurity, whether or not they're actually in danger. For example, rabbits have been known to die from shock (which really is just extreme stress) because a predator is stalking around outside their hutch.

Rabbits are also stressed out by not being able to express their natural behaviours: socializing, playing, grazing, etc.

See the related question(s) linked below for more information.