Yeah, i noticed that seems to be how they shoot up. Kind of like how fast quail grow!
Ya know one at that age will brood a younger batch of poults for you very easily. The enjoy tending and teach the younger poults very well. Out of each batch I watched to see which was helping teach the others and that's the one I put with the next batch hatched. It makes it so much easier. I put a video on the old folks home page of one of mine that I kept in a playpen that raised several batches of poults for me. It was on the old server so I don't know if it got transferred over.