We had a mishap, sad to say. We had 50 Jumbos. At 4wks it got a little cool one night and they crowded under the 1 heat lamp we had on and 9 of the little buggers got suffocated in the mass of birds huddled for warmth. So yeah, they need some space and they need more than 1 heat lamp if you have several birds so they dont kill each other. Talk about feel dumb! Water is really important too! Their little metabolisms are going 90 miles an hour so they make a lot of heat and they need lots of water which then when mixed with thier high calorie feed results in lots of loose poops. It's not diahhrea, they are not sick. Loose poops are to be expected. I would like to try the fermented feed method some time. I hear that creates less nasty poops.