I have way too many layer chicks and have decided to switch my White Rocks into meat birds. They are 11 weeks & 6 weeks. I had them on chick starter & grower & just switched them to finisher feed. Do I need to put them on any different type of feeding schedule? I've read something about feeding them for 12 hours and then removing the feed. What is the reason for this? Is there anything else I should be aware of or need to know to get this chicks ready? Sorry, this is the first time with meat birds. Thanks for your help!