Hello! I have some 9 week old chicks and am running low on their grower feed. I've had some on order with my feed store but the shipment still hasn't arrived. Hopefully they will have it in a few days. Will it be ok for me to feed the chicks the layer feed my older chickens eat if I run out of the grower feed? I don't want to change the brand of feed they are eating. Thank you for your help!