thanks theres some good sugestions there, if im honest i found condensation in there sleeping quarters the otherday ,ill have to make more velalation. the reason im asking about keeping them warm is, when the temprature is down to minus 5 ect and the snow is deep (absolutly freezing cold) the water bottles are frozen solid, and the wind is howling , i used to put more bedding in for them and put old curtains/blankets over the hutch to keep the warmth in, i have 2 albino jills, and they curl up together and keep eachother warm, so i guess the advice iv had is to put extra bedding in ( venta