Dogs are naturally inclined to have a sense of home. In their wild past, they were accustomed to living in packs and held the leader of their pack in high esteem. Dogs also have a sense of territory, so they take their sleeping area very seriously. While a pet dog might run around and not always sleep in one spot, you can often tell if your dog needs you by where it habitually sleeps.

If your dog constantly follows you around, going wherever you go, and even when you're sitting watching TV or working on the computer, it lies down next to you to rest (though not necessarily sleeping), it means it's very attached to you.

Some people prepare many different sizes and shapes of dog beds for their dogs, but the dogs don't appreciate it and insist on sleeping under the table or other sheltered places. This means that your dog lacks a sense of security, and the place under the table makes him feel safe. The position of their bed may need to be adjusted.

Some dogs won't even glance at the bed you prepare for them, insisting on sleeping in the same bed as you. For them, no matter how comfortable the dog bed is, it can't compare to sleeping with you. This means that the dog really likes you, trusts you, and feels 100% safe by your side.

Another sign that a dog feels safe is that it will turn its rear end towards you while sleeping, indicating that it truly trusts you completely. This is because a dog's back or rear end is what it most wants to protect. Therefore, when a dog turns its most guarded area towards you, it means that it has absolutely no wariness of you, feels 100% safe with you, and believes that even if you are out of their sight, you will not harm it and can even protect it.

If your dog habitually sleeps with its back against a wall or leaning against something, facing outwards, it's actually due to a sense of security. Dogs feel fear when their backs are unsupported, and the direction their head faces is the first direction they'll react in case of danger. If you notice your dog habitually sleeping in certain places, you can help them create a cozy, comfortable sleeping spot to make them feel safer.

Dogs are light sleepers, and poor sleep can negatively impact their health. Therefore, ensuring your dog sleeps comfortably is important for their well-being.

Source: https://www.loveupets.com/report_detail_pc.php?id=607