Dogs fight without scratching? The reason is very simple~

Have you ever noticed that dogs fight without their claws? Why is this? In fact, the main reason is that dogs have no clavicle. This physiological characteristic helps them run and jump, but it also makes the forelimbs less flexible.

Therefore, when a dog without a collarbone encounters a conflict or fight, it will feel powerless to attack, so most of the time it will bite directly.

Before dogs evolved to walk upright, the "hands" of dogs actually had the same function as the "feet", which was the shape of the dog's ancestor, roughly similar to that of a dingo. It takes about ten months for a dingo's skeleton to mature. The dog's bones are innately suitable for running and jumping. They are used to support body weight and maintain body balance, and other movements are mainly performed by the mouth.

Modern humans have made many changes in the reproduction of dogs, but many dogs still retain the basic characteristics of their ancestors. Dogs' shoulder bones lack collarbones, a structure that allows them to take longer strides when running and jumping. Like most dogs, they have powerful muscles. The dog's circulatory system provides sprinting and endurance, and the canine teeth are suitable for catching, biting and tearing actions. Dogs now tend to walk on all fours using their front and rear legs, and most dogs have degenerated upper claws on their front legs.