Don't understand why people keep saying the game is slow/laggy. I'm not having any problems at all. In fact it's moving pretty quickly and smoothly for me. Don't blame the game/creator if you have a crappy computer. ;)
Peck does 1 damage. It attacks as fast as you push the button though. Using the chicken I did enough to get the badge of the day, and killed everything very quickly. Plus if you run low on health, you can just fly to the exit.