Hello, I have six cornish x with two mammoth bronze turkeys. I am feeding them what they gave me at the store which is game bird starter 28% protein. The bag said to feed the turkeys this until they are 8 weeks and then switch to game bird grower. However, the chickens will be butcher ready at 8 weeks. So is it ok for me to keep feeding everybody this until the 8 weeks are up and we butcher the chickens?? Thankss.