2. Weatherproof your coop and run. There are solid arguments in favour of insulating backyard coops in our climate. There are many options for insulation, but whatever you choose, take care to make it inaccessible to the chickens as they will peck at any exposed areas. Another aspect of weatherproofing is keeping the run dry. The run should be roofed and protected from blowing snow. Some people choose to use clear plastic to wrap their runs; others use tarps, plywood, or clear solid plastic. Consider your individual circumstances, and do a bit of research to see what will work best to keep your hens happy. Do your best to avoid drafts in the run, while ensuring adequate ventilation (more on this below). Other recommendations include providing a wider roost, such as a 2x4 with rounded edges, so that the chickens extend their feet underneath them at night, warming them with their bellies.
3. Ensure the coop is draft-free and well ventilated. Proper coop ventilation is critically important in the winter. Drafts, or air blowing across or around chickens, take away the natural protection of their feathers. However, humidity in the coop drastically increases the risk of frost bite. To adequately balance these considerations, design your coop so that in winter air ventilates upwards, and not across the hens. While windows are helpful in the summer, in winter you will need a different form of predator-proof ventilation near the top of the coop, to allow humidity to escape without disturbing the hens. In the example shown above, the window can be closed in the coldest weather; however, the coop contains predator-proof vents in the ceiling underneath the plastic roof, which ensures draft-free ventilation. Remember during the winter to keep bedding dry and watch for signs of moisture. Any visible moisture build up is a sign that your coop does not have enough ventilation.
6. Ensure the chickens have enough room to move about, and activities to keep them busy. Making sure your run is comfortable will go a long way towards ensuring your hens are happy in the winter. Keep lots of dry bedding, so the chickens have a relatively warm place to scratch and move about. Add a dust bath and different areas for the chickens to stand and take in the world. Look into different ways to keep them entertained; there are plenty of great ideas online. Watch their behaviour - do they seem happy? If not, take stock of the conditions in your coop and consider what needs to be improved.
7. Consider light and heat, with caution. This is a topic for you to consider very carefully. Chickens need over 12 hours of light to produce eggs, but some people prefer to let them take the natural winter break from egg production, and therefore do not add additional, or much, lighting. With respect to heat, some owners feel that chickens can become dependent on a heat source and will experience stress if it is suddenly removed or if the power goes out. In a dry, draft-free environment with adequate food and water, cold-hardy breeds can adjust very well to colder weather. However, to help their hens stay comfortable through the coldest periods, owners may choose to add a safe heat source. Research carefully in advance of cold weather, and be very cautious. Electricity can be a fire hazard, in coops as elsewhere, and there is potential for burns from heat sources that are too hot or too close to the chickens. Heat lamps are often cautioned against, so some people use low-wattage infrared bulbs or flat panel heaters. Whatever you choose, don't forget to monitor conditions in the coop. If something isn't working for your hens, re-evaluate and adjust your set up.