The standards of "good" animal welfare vary considerably between different contexts. These standards are under constant review and are debated, created and revised by animal welfare groups, legislators and academia worldwide. Animal welfare science uses various measures, such as longevity, disease, immunosuppression, behavior, physiology, and reproduction. The care and maintenance of animal house is to maintain the house a pet is been kept as its living place. An animal house should be kept tidy and clean to allow free ventilation and improve the standard of living of the pet. There are several options to care and maintain rabbits’ house. They can live free-reign in a bunny proofed room/rooms, or they can be contained within a puppy pen, bunny condo, or large rabbit cage. If contained, their space should always be large enough so they can hop around, and they should be let out of their pen for at least a few hours everyday for exercise.