Why do dogs like to put their heads on the edge of their nests?

Dogs like to put their heads on the edge of their nests because they feel comfortable. Every dog ​​has different habits. Some dogs feel that sleeping with their heads high up gives them a sense of security. . Just like people, sleeping with your head tilted back may cause congestion in the brain. Dogs like to lie with their heads down and they choose the most comfortable position. The owner does not need to intervene too much.