Many cages sold by pet stores are far too small for even a young bunny, let alone a grown one. Keeping them in these tiny cages can cause a range of health problems, including obesity and even deformities if they're not able to move around naturally. It's also cruel. Bunnies are smart, social and highly curious, and they need to be able to explore their surroundings. They're also incredibly active, and love to run and jump. Recommended are at least 8 square feet of housing with at least 24 square feet of exercise space, which the bunnie can access at least five hours per day. And that's the minimum. Many bunnie owners choose to let their bunnies have free range of their house just like a dog or cat would.