At what age do you switch meat birds from chick starter to grower/finisher? I will be feeding dumor or purina from TSC. I get my meat birds in 2 days and want to know how much feed I need to get right away. Also, do you make feed available to them around the clock or do you give them a schedule? I have heard of some people feeding them 12 hrs on and then giving them just water for 12 hrs. What do you think is best?