I have 4 red pullets and 2 sebright bantams. I just now got to the bottom of a 20 lb starter/grower feed mix I've had them on since I bought them in April. My mom had bought my sister 4 pullets as well. She finished her bag about two weeks before me, while I am just using the last of it up this week, and I have 2 more chicks than she does. Have my chicks been eating enough? I always keep a supply available to them. Perhaps it is because mine had a warmer heat lamp? And have remained inside longer? Should my feed be gone by now and do I move onto the grower feed once this bag is gone?