I have 3 buff orpington chickens that are 6 months old now and still aren't laying. I have had them on grower feed because I read you shouldn't give them layer feed until they are actually laying. I'd hate to buy another huge bag of grower just to have them lay and have to get a different kind. Do you think its okay to give them layer feed anyways? Should I have given it to them at 18 weeks? I am worried I caused some sort of nutritional deficiency and that's why they aren't laying. Any advice would be great thank you!!