First, the dog is not a fixed sleep time, every time duration of sleep are not the same, Then dogs like to hide their mouths under their feet when they sleep,because their noses are the most sensitive and can keep their noses alertat any time. If the dog is often in a shallow sleep, it will be a lying position,but if the dog is asleep,it will lie side by sideWhen a dog is awoken while sleeping,it will appear to be in a bad mood.The newly awakened dog's eyes were hazy, and sometimes the owner could not recognize them.A dog who lacks sleep will lie on the ground whenever it has a chance, and its eyes will be lost.