What I meant to say..
I'm sorry.. this is a very scary time for many.. and it's challenging to know what the right thing to do is sometimes.

It's also dark and weird here, raining ash.. and much cooler than the heat wave of the past several days, though nowhere on par with most places. Hope their is some reprieve for the fire fighters, the families, the wildlife, the forest, and our flocks!
At 6 weeks old your birds will adapt to whatever you think is best! My previous thought on it maybe being more stressful was if they were actually laying already, I must have missed their age.
I don't have air conditioning here.. and internal air is equivalent to outside.. Shutting the windows might not help for ME. Please use your best judgement, according to your personal circumstance!
Maybe you can get more tips, and quote taken from another link..
https://www.backyardchickens.com/threads/smoke-and-chickens.1409925/#post-23144726
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MROO said:
Put lightweight curtains over the hardware cloth/chicken wire/screens and keep them damp. That filters out a lot of the ash. You'll need to totally rinse them out frequently, though, as the ash will clog the fires, trapping air and ammonia inside. You can do it while they are still in place, as long as the water doesn't run into the coop. The same trick works for your house windows - damp sheets hung over your screens and cleaned frequently. Both are lessons taken from friends who went through the Camp Fire a while back.
Good Luck ... and stay safe!"
One of the tips I remember from growing up in California.. was to limit activity on bad air days.. which also limits respiration essentially.
Breath easy dear chickens and chicken friends!
