I have six chickens who are 32 weeks old. Two have been laying for a month, one more is possibly laying, and three I suspect not. Days are so short now. I bought a bag of New Country Organics layer when I got my first egg about a month ago, and they're about 2/3 way through it. Will finishing out the bag of layer hurt the three chickens that aren't laying? I'm going to buy a bag of Grower next (have oyster shell on the side and I scatter it around the run every so often too), but would like to use up the rest of the bag of layer first if possible.