Golden retrievers are generally in a light sleep state and can wake up at the slightest movement, but there are also times when they are in a deep sleep. Dogs are not easily awakened from deep sleep, and sometimes utter sleepy babbles, such as barking and moaning, accompanied by twitching of limbs and shaking of head and ears. When sleeping lightly, the dog lies in a prone position with its head bent between its two front paws, often with one ear close to the ground. When sleeping, he often lies on his side with his whole body stretched out. It looks very relaxing.