I've read one one source that cedar should not be used. Why? I've read on another that paper towels should be used for lining brooders until the chicks are over two weeks old, otherwise they might eat them?! Is it better to start with paper towels than pine shavings? Also, if I use a dog kennel for my brooder (which I've attached 1" chicken wire to) will this be warm enough with the lamp in place?