I have 21 new BBB turkeys, I have them in a plastic tote brooder with a sheet for the bottom. I have their permenant brooder ready and warm, but I have pine shavings and I don't want to put them in it to soon because of them picking at the shavings and getting impacted. My question is when to move them? I have had them for four days now and started chick grit today. Any thoughts???