I've heard before that some hatcheries say they include "special heating packs" so you can order less chicks if you live in a big city. But then the special heating packs turn out to be extra chickens! I just ordered 4 chicks from Mypetchicken, and I wanted to know if their heating packs are extra chicks. I doubt it, but I just want to make sure. The extra chicks would not be good. I wouldn't be able to keep them, especially if they are roosters!