Carol and others, No, the hens are in their own space. My greenhouse is one of those experimental efforts built by a semi-engineer ex-hippie and her computer geek husband. The structure has a fatal flaw and so has become lopsided but still works. The south side is lexan panels, the north wall of the greenhouse is cement blocks with lexan openings, and the hens are on the north side of that wall with a solid wall on their north. There's a little entry area with a door (lexan) between the hens and the plants. Got all that? Basically the thing is solar-heated but on cold days I have an electric heater. This is something I have to review because those dogone little heaters don't seem to last. The thermostat goes almost at once so I have to go up there to turn it off on sunny days, back on at night.....bo-o-r-r-ing. But it stays above freezing alright. My dahlias enjoy a winter sleep under the bench, and my amaryllis snooze happily in the hay on the hen side. My cactii and orchids like the large differential between the day and night temperatures. Unfortunately the cactii are getting much too big. I like them when they are small, but what the heck am I going to do with them now that they are getting many feet tall? Or wide? Hate to toss them, but they need to be planted in ground beds.....which means a new greenhouse......hmmmmm. Anyway, don't worry, my hens aren't eating the mothballs, my plants aren't freezing, and the mice or whatever seem to be staying away from the mothball-treated pots. Lis Allison, Carp, Ontario, Canada, still -20C but sunny and fine today