Hi everone i have 4 chickens that are about to start laying and 5 more a few weeks later i am getting 8 new babies next weeks and my question is i know by the time the new ones go outside the older ones will be laying how do i feed the different ages but give the older ones what they need inorder to produce healthy eggs can i just feed them the grower pellets then give the older ones oyster shell is it safe for the older ones to be on grower pellets that long dont they need to be switched to the layer pellets first time chicken owner and would really like some help