Hi all, I got my first chicks in September (they were hatched on 9/11) and I was planning on putting them out in the coop when they are seven weeks old but am now concerned that is too early because nights will likely be dropping down to low 40’s when they are seven weeks old. I do have electricity in the coop, so could put a space heater out there. For completeness the breeds are: buff Orpington, barred rock, australorp, Easter egger, and silver laced wyandotte. Thoughts?