Do you have places where your flock can get up off the ground? My handy-husband built the beautiful perch in this picture using some leftover wood posts from building the run and a large stick(with any pokey parts removed). Before winter approached, I also took several spent garden pots and simply up-ended them in the run. They love to hop on top of them to perch, especially when there is snow on the ground!
We have been looking for a nice log stump to use as well, but have not had much luck here in suburbia (and we don't want to pay a fortune for one in a store)! The rabbit LOVES to hop on top of his "box " (a large wooden shipping crate-not pictured) and lounge as well. Rabbits love to have a place to rest that is up off the ground a bit and gives them a "lookout" spot. What have you used for 'snow perches?'