Kimbroe, am in the process of changing to flock raiser because of the different ages and sizes of my flock...Too many chicks have entered and getting harder...will continue to give the chicks, chick starter before mom takes them out to free range...so wonderful to see the 11 babies out in the yard just scratching around looking for eats ------The older chicks 3 (7 wk,. olds) 10 ( teen agers) I call them and 4 of the oldest pullets all mixed in with the laying hens...chickens are amazing and wonderful, have such great personalities-- get along great, no trouble integrating...I let nature take care of itself with them, they know about chickens more than I do...Ha....Have only been doing this for a couple of years so am learning also.... each one is different.. Kimbroe, I would feed them flock raiser until the little ones are ready to lay... That seems to be the advice given on this thread..