My 5 babies will be 4 weeks on monday and they are getting huge and stink. Yes I change their shavings 2x daily and take them out for play time. Their brooder is a tub in the bathtub(finally found a use for the sunken wp tub). The bathroom is 12x8 and has a large window. I changed out the heat light for a mini fan as the it has averaged 80 to mid 90's. They seem happy and healthy so I guess thats the most important thing.