Lydia, you could also try some deep litter in your coop and create heat in that way, while also keeping your coop cleaner without the use of poop boards. A well cultured deep litter can be a source of protein, allows good bacteria to grow while inhibiting the more harmful pathogens, and can insulate the floor of the coop and keep birds warmer in the winter, keeps down flies in the summer. The best part is that it cuts the labor of coop care down to about nil.