In inclement weather, chickens that cannot access areas they are accustomed to frequenting (either the run or pasture because they are snow-covered) will quickly get bored, which can lead to feather picking and cannibalism.
The Backyard Homestead: Produce all the food you need on just a quarter acre! (A very good overview book, I also recomend picking up the companion to it "The backyard homestead; Guide to raising farm animals")
How to Raise Chickens - All about Raising Organic, Backyard Chickens I'll have to give it a good once or twice over but I thought I'd share it for others like myself who are almost clueless about raising poultry.
We now know that nothing is separate in the universe. WE are everything around us. Would you cut off a body part? Then why continue to live in a way that is just that, self mutilation. We didn't create this modern reality but together we can shift to a new paradigm that values regeneration, vitality, & the simple gift of existing. www.hawaiiecoliving.com