A cat’s front paws are as flexible as human hands, and its secret lies in the collarbone. The clavicle allows the cat's front legs to move left and right. Although the cat's clavicle is somewhat degenerated, it is obviously present. It is very easy for the cat's front legs to move left and right. The dog's collarbone has completely degenerated, so the dog's front legs can barely move from side to side. It is precisely because of this collarbone that dogs always lose when cats and dogs fight.