Watch kittens stalk and attack each other

The instinct to stalk prey, real or feigned, sets in amazingly early for felines. While their infant counterparts from other species can't even sit up without assistance or need Mommy to bring them worms, cats are itching to start wreaking havoc. Though this litter has seemingly only recently mastered walking, they're already primed to kill something – or just hog-pile their siblings – but not without first enjoying the thrill of the hunt.

Check out the msnNOW.com homepage to read more trending stories.