Question....
DH just asked me about the logistics of how this was going to work when the newest chicks (up to 12) hatch. If all 12 hatch, the new babies will need the big brooder because that many will not fit in the fish tank brooder. We'll let them dry off in the fish tank brooder, but they'll need to move quickly to the bigger one. Will my 4 older chicks, who will be 8 weeks old at that time, be old enough to go outside full time in the mini coop/chicken tractor? The mini coop has a hardware cloth floor, and will be completely predator proof.
Today my older chicks played outside quite a few hours without being under the light, and seemed fine, so I hope that's a good sign.
I guess the tiny babies could go into a large Rubbermaid tote for a week or two, if we need to grow the the bigger chicks out in the big brooder a little longer.