What is the situation that dogs love to sleep in cold weather?

Many friends will keep some dogs, but they don't know much about their maintenance knowledge. For example, what happens when dogs love to sleep in cold weather? 1, young people need supplementary sleep, especially when the weather is cold, they need nutritious food and enough sleep. Dogs sleep for about 20 hours every day, either eating or sleeping, just like human cubs. 2. Older dogs are tired and love to sleep. They don't like to move more. A little exercise takes a long time to restore their physical strength, so let him sleep without disturbing it and cover him with a quilt to prevent him from catching cold and getting sick. If an older dog is sure that he is still breathing, just try his snorting with his fingers. There is no need to worry about breathing normally. 3, sick, cold dogs are also prone to illness, if the dog is listless, with symptoms of runny nose and tears, it is necessary to take the dog to see a doctor in time.