Okay, I've been checking out mail-order chicks and have read several places now including on here about the hatcheries sticking roosters in for --what do they put them in for--??
...heat as I understand it, and to take up some space to prevent shifting just like the "packing peanut".
They use them to keep the temps up. Most people order pullets so there is an excess of roos and that is why they use the roos as packing peanuts.