I've raised and shown fancy pigeons for many years but always wanted chickens too. I finally decided upon the ornamental layer collection from Murray Macmurray. I am hoping to get some crested varieties in my order. I will be building my coop in the next few weeks and trying to learn as much as I can before my new arrivals get here. I plan to socialize my birds as much as possible and hope my two chihuahuas will be accepting as well. Questions? 1) why are cedar shavings toxic in the coop? 2) I plan on using a tub brooder with an infrared heat lamp. Anything I should know when using this type of brooder. 3). How many square feet of outside area should I enclose per bird? Thanks in advance for your replies!