This situation must be corrected in time and punished when it shows its teeth. Of course, the most important thing is to find out the reason why it shows its teeth. It may be that its parents have spanked it recently, or it may be a bitch that is guarding its cubs. Wait for the reason, you just need to solve it in time.

Tip:

Dogs have a sense of hierarchy. We need to establish our own prestige from an early age so that the dog is inferior to us, otherwise it will become lawless.