I know american bullfrogs eat crawdad frequently in nature, so it could work I suppose.

I have never owned a pacman, but from everything I've heard they are a very sensistive species. I personally would just be scared to try it unless the crawdad was freshly molted and still squishy. They should still have lots of calcium in them, it just hasn't hardened into a shell at that point.

...you could always drop the crawdad in a pot of boiling water and eat it with butter That sounds like a joke, but it's actually not LOL! Many a pet crawdad has turned into food in my house.