So the 12 fuzzy butts were getting too big for their brooder. My brooder is a 3' x 3' box. Contents were 2 waterers, 1 feeder, two perches, 2 inches of bedding and 12 chicks. 1 Delaware"Sweetie" -4 weeks old 2 white leghorns -3 and 4 weeks old 3 BR pullets "Barbie" is missing the tip of one toe -4 weeks old 1 BR roolett "Ken" -4 weeks old and 5 seemingly small, Brown leghorns 3 weeks old. They probably had plenty of room for another week or two, but DH and I figured we would section off part of the run for the little guys. So now they are in a 15' x 6' totally enclosed pen. We turned their old brooder on it's side, so they still have their light and cozy room. The only problem is... now they look way to small for their pen!!