I'm very lucky to have a local feed mill close and they make good food the starter is 28% and I've mixed it with chick starter 20% for now because I have the chicks in with them until the weekend. They make a grower that is 23% and I feed that to my meat birds mixed with chick starter when they get 4 weeks. I need to feed my turkeys good as I want to butcher them in Nov and Dec. I have MW's and BR's and I hope soon to have Auburns so do they need to stay on the starter for 8 weeks or can I mix it at ?. I cannot believe how much the BR have grown they are twice the size of the MW only 5 days difference in age and they want to fly around pretty cute as long as they don't get out where they shouldn't be.....