I'm getting baby chicks next month and going to buy everything now. Is it OK to have 1 brand of feed for the babies and then change brands as they grow up. Right now we are in code red and the stores are running out of very low of stock. So I can only buy one brand for the babies and one brand for layers. The brand for babies are only for day old to 12 days. So I feel I should buy both right now, what do you guys think?