Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to protect chicken combs from winter cold [title] Wait until the evening. [step] To keep a better control over your birds, wait until they have entered the roost for the night before applying any covering. Overnight is when the temperature will be lowest, so it is when your chickens will be most susceptible to frostbite.

Ending1: At night, you can roll up the wool and store it in a closed container or large cardboard box. [title] Cover your bird's roost and rest in comfortable bed. Ending2: [title] Check for signs of frostbite. [step] Before adding anything to your chicken's comb, make sure they aren't already suffering from frostbite. Ending3: [substeps] If you have hens and it is cold, do not use a covering. That is dangerous for your chickens and will encourage disease, or even death. Ending4: Don't wait more than three hours. [substeps] If using an evening covering, consider covering it in a heavy-duty sheet that will keep your birds from escaping to the roost after it's covered.

Answer format: ending1/ending2/ending3/ending4