Dog Scares Cats While They Are Locked Into Bird Outside [VIDEO]

Watch as a dog walks up behind three cats and scares the hell out of them, while they're locked into a bird outside the door.

All is calm until the dog walks up innocently and startles the cats. Not knowing the dog is behind them, the cats go into defensive mode once startled.

I can't lie, I watched this video SEVERAL times and it got funnier each time I watched it. No word if the cats made a mess in the house, but if I were a betting man I'd say they did.