Pups often move to their human’s sleeping spot if the human gets up as a sign of affection. They also might relocate because the spot you just left is now warm and cozy. However, if your dog doesn’t when you return to sleep, it could mean they don’t feel well, or this could be a sign they are trying to show dominance. Behavior modification training with positive reinforcement will help combat this. If your dog moves to comfortably sleep next to you, however, it just means they were showing affection and perhaps keeping the spot warm for you.