Unless you have a broody hen to raise your chicks for you, a brooder box is necessary.  I made our brooder boxes out of really large plastic storage totes.  Just before we moved the chicks that hatched in the incubator to the brooder box, I went to double check that the box was ready for them.  I quickly found out what happens when it’s cold outside and you hang a heat lamp up in your bathroom.  At least she is black and white like her chicken siblings.

Snoozing in the chick brooder box.