If you're concerned about a dog you know who is sitting in a corner facing the wall, it's best to observe them carefully and consider the following:
* Is the dog showing signs of stress or anxiety? This could include panting, trembling, lip licking, yawning, or hiding.
* Is there anything in the corner that might be causing the dog discomfort? This could include a loud noise, a draft, or an uncomfortable surface.
* Has the dog's behavior changed recently? This could be a sign of an underlying medical condition or a change in their environment.
If you're concerned, it's best to consult with a veterinarian or a professional dog trainer. They can help you determine the cause of the behavior and recommend appropriate solutions.