Good day ALL, Just a little background before I get started, I have a fair amount of experience in raising chicks as I incubate and raise at least 100 chicks per week. These are mixed breeds (Rhode islands,orpingtons, mix jumble no specific breeds). They are quite hardy so not many fatalities. I purchase the eggs from a local farmer and set them in my incubator. I don't have my own laying flock. I then raise them up to almost 3/4 weeks until I sell them. This is a tiny sideline hobby/business. I had recently attempted to grow broilers as I am informed that they grow fully in 8 weeks. For some reason I failed miserably. I purchased 3 batches of 100 chicks and all 3 times I failed. Now I am aware that generally fatalities would occur during the first 3 weeks, I found however that my chicks would be fine up until 3/4weeks, and then I would get many fatalities. Sometimes up to 8 chickens a day, I have several infrared heat bulbs but all concentrated in one area in their shed. The fact that they survived quite well during the 1st 3 weeks leads me to believe that the heating was OK. I feel that they would probably be affected by their litter and for that reason they die? I am now considering purchasing this make shift coop which is properly insulated so I do not foresee any heating issues here. I plan on using gas heaters in here as opposed to the electric infrared heat bulbs I normally use, I'm just a little concerned on how the heat will be regulated since the electric heaters have a thermostat that can be set. During my last attempt to grow the broilers, I used shavings on the coop floor. I feel that this probably contributed to the high mortality rate. My inclination now is to rather use these slates on the floor. Any ideas or suggestions?