ventilation in nest boxes?

[Mel281]

I have noticed some of our hens are getting frostbite on their combs. The two that I've mostly seen it on are the Buff Orpingtons, which are our 2 broodiest hens.
So I'm wondering if the frostbite is coming from inadequate ventilation in the hen house (certainly possible) or the nest boxes. Is it necessary to add ventilation to external nest boxes?

 

[tracecom]

I have never heard of ventilation being required in next boxes; in addition, the hens should not be spending much time in the nest boxes. Frostbite is more likely when they are on the roost. Is that a big opening in the front door? It looks like it would be drafty, and if so, that could be the problem.

 

[Folly's place]

I was just thinking that you may not have enough ventilation, not too little. Do you have vents on the sides or back of the coop? Is it damp in there when you open it in the morning? How many birds per square foot of coop? Your hens shouldn't be sleeping in the boxes. Mary

 

[RonP]

Hen house, not the nesting boxes.

This assumes your boxes open in your hen house, to allow the birds access.

How many birds, how many square feet inside the house, and how many square feet of draft free ventilation does the house have?