Never use a heat lamp. They are chickens...they have feathers, they are fine. Have you ever found a frozen Cardinal or chickadee? No.
Relax & enjoy your chickens, worry more in the heat of August.
That was me, and we did organize a Coop Snoop & Garden tour. Proceeds went to Chester Springs Library.
You will be happy to know that soon we will have our very own Tractor Supply store on rt 113 where the old Redners Mkt. was.