This is my first winter with my BYC and I was wondering whether or not to put a heater, probably 75 watts in my coop. I live in Southern NJ 10 miles inland from the coast. and we rarely get into single digits, mostly teens in the dead of winter. I have 4 dominicker chickens that are 1 year old in a 4x4 sq ft coop. I believe these are considered winter hardy birds. I've read both pros and cons about heating the coop. I would like to hear some thoughts on this subject. Thanks in advance for your comments and help.