Bark down

Baxter has met his match. Another dog, who is dashing and adorable, identical in size and color has entered the mix. He has regular "bark down" where he stands angrily barks and growls for up to 30 minutes. He refuses to back away from this fierce competitor and is perplexed as to his behavior. Every move he makes is mirrored only without sound. He tilts his head in confusion and gets angrier with each passing second. I wonder when he will figure out this is just his reflection.