I have no experience raising rabbits at all. I was not in the market when this little guy found me in our back yard. I learned from neighbors that he and another bunny had been chased by a dog and while his friend was killed, he escaped to my house. I vowed to keep him safe and give him the best bunny life ever. I built him a 3 story rabbit cage with a run so he can dig in the dirt. Of course there is chicken wire in the bottom of it so he can't get out and nothing can get in. Now with winter approaching I would really like some input as to what I need to do to the cage to keep him dry and warm. He only goes to the bathroom at the very end of the run so I'm wondering do I need to enclose the run for winter. There is a ramp going from the run to the barn which also has a snug nesting box for him. I was thinking a heat lamp to help keep him warm and help his water stay thawed longer but I don't want to roast him out. Any suggestions would be greatly appreciated as this is all new to me. Thanks in advance!