I have been hatching chickens in my classroom for many years and this year I keep 4 hens. they hatched out in late April. They free range all day in my back yard. a friend told me she heard from her friend that got it from another friend that had chickens that I need to give my girls laying pellets. ??? I am giving them chick starter twice a day and they are loving my yard flowers and all. what is this laying pellets and do I need to get some. I read they will need calcium When they start laying. can someone shed some light on this?