but mufasa is a 9-month-old rhodesian ridgeback. he looks big, but he's puppy. he's in the field with some cattle until the bull you see on the left decides, hey, you're not a cow. what are you doing here? and here comes the little dog. he's got little dog napoleon syndrome. mufasa is scared. he's running away. but the little dog is challenging the bull. that's a brave little dog. >> little dogs always surprise me how they bark and snap at big dogs. i think if you got a chihuahua out there, it would whip these cows into shape. >> i have a chihuahua, paco would get these cows into line. >> all he does is bark a million times. >>> he could take that one-on-one, but how would he do against amos, you know, amos the horse? >>> kobe, michael jordan, shaq, they have nothing on this guy. ♪ >> check that junk out. >> slam dunk. this is amos, also known as the wonder horse. and the video actually came directly to us from a "right this minute" viewer. shelly saydell. ten years old, a miniature horse. but if you think slam dunking is his only amazing ability, you are wrong.