At Oabruck Zoo in Germany, a lionhearted chihuahua named Spock menaced a lioness named Luna. Spock is exclaiming most insistently, "Cat! Yap! Cat! You're doomed! I can take any cat! Yapperoo! while Luna seems to be wondering "what the hell is that?"
Spock's owner said, "I have the bravest dog in the world." As an additional amusement, the photograph below shows what I like to imagine to be Luna's offspring after Spock got in her cage.