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It's a dog-eat-dog world out there, and Kate Bosworth's party guests learned that the hard way over the weekend. At a little soirée to celebrate the success of her new crapfest movie 21, Bosworth's dog bit co-star Aaron Yoo square in the face!

Sources over at X17 say that Yoo was rushed to the hospital for stitches. But we're wondering if this isn't part of Bosworth's master plan to sick her Cujo-like beast on every young actor in Hollywood so that the only person left to cast is her. Lord knows she won't get ahead solely on the "strength" of her acting.

[Photo Credit: X17]