Left animal radical - side-form of
犬 (dog), used for any quadruped. The indexing radical for
狂 and the source of meaning:
狂 originally meant a rabid dog, the foaming-mouthed animal whose erratic violence gave Chinese its core word for 'mad, wild.' Same family:
狗 dog,
猫 cat,
猛 fierce,
猴 monkey.
