Bunnies love gnawing on things in order to keep their teeth trimmed. Because of this, you need to make sure that there are no exposed electrical wires or other hazardous things that they can get to and chew on. Pet rabbits take a lot of care, and need a lot of attention, like all live animals.
Pet rabbits need a roomy enclosure to live in, with proper bedding. You will also need to buy rabbit pellets for them, and feed them fresh greens and the occasional fruit, in order to keep their diet varied and healthy.
Appropriate food and a habitat for rabbits is one of the main ways to keep your new pet happy and healthy. If you have any other bunny care questions, you should always ask a PetCo employee, or your local vet.