I'm thinking of starting to breed my own rats for my 8 BPs, 3 Kings, and 1 Cornsnake and want to keep the breeders healthy and happy for as long as possible. Do they need anything in their cages/tubs besides a water source and a food source? Do they need anything for exercise or chewing like you would need if you were keeping a rodent strictly as a pet? As I type this I'm envisioning a hampster cage but do rats have different husbandry requirements?

Thanks!