I've got 2 rescue buns. they have a lovely heated shed. At the moment the heater is on as its only 1 degree outside. Just went and let the dog out for her last wee stop and the 2 rabbits are sat out on the concrete in the run! Why dont they go through the tunnel into the snuggly warm shed where there is a lovely fleece for them to lay on? I have the heater on as I've also got 5 guinea pigs in there (seperate cages) Does any one restrict access to the outside when its freezing or just let them make their own minds up where to lay? :?