Mine are tested tough to -4°. They have a goodly amount of fluff, and they are not a loose feathered bird. Good ventilation, but sheltered from drafts and wind is key.
For winter eggs you'll want to time your pullets to hit POL in early Nov. My hens go on holiday in mid Oct, and resume in mid to late Jan with no supplemental lighting.
For winter eggs you'll want to time your pullets to hit POL in early Nov. My hens go on holiday in mid Oct, and resume in mid to late Jan with no supplemental lighting.