It means the dog likes you

When a dog stares at a person for no reason, it means that the dog likes this person very much. When a dog likes its owner, it will watch every move of the owner, as if it wants to engrave every move of the owner into its mind. The dog's face will have a soft expression with slightly narrowed eyes.

It means the dog has a complaint

In most cases, dog staring is normal behavior. If you notice your dog staring at you, it’s likely that your dog has a complaint. If your dog stares at you eagerly while you are eating, it may mean that he wants you to give him some food. The dog may also be staring because it wants to play, or it may need your help and wants you to notice it. If the dog wants to go out and have fun, it will also express its emotion of wanting to go out by staring lovingly.

It means the dog is interpreting

When your dog is staring at you, he may be interpreting your facial expression and deciding what to do next. Dogs will be willing to please their owners in various ways, and staring at you can help them make correct judgments. If you show concern, your dog may immediately curl up next to you and try to comfort you.

It means the dog is hostile

If the dog stares at you with a fierce and hostile look, it means the dog is hostile. If your dog’s eyes become fierce and aggressive, you must pay attention. If your dog is extremely possessive of an object, such as a toy or food, and once you approach it or want to reach out for it, it will stare at you and bark to warn you to stay away.