I try and downsize for winter because I free range my chickens and it costs more to feed them through winter when they can't eat bugs/grass/etc. Although if we have another winter like last year should be no problem LOL. Plus if I can downsize one of my coops I can go from three coops to two, which is less work in the snow. =)
Not to mention, one of my coops is a tad crowded - which is no big deal when free ranging.. but if they have to stay in the coop all day, could be a problem..
Still haven't decided if I can keep the electric netting up during the winter. I guess I'll probably leave it until there's a 'big' snow. It's been absolutely wonderful, just in case anyone is thinking buying. I'm still wondering why none of the 50 chickens in that area haven't flown out of it!

(now that I've said that, they all will lol.