I have ordered from a number of hatcheries, and generally had good results. But I think the weather can make a big difference. If it is extra-cold or extra-hot, that is really hard on the chicks. Also, it looks to me like the chicks do better when they are shipped in larger groups (15+) not in...
For eggs that are just super cold to the touch, but not split open, I would expect them to be fine for eating.
Cracked eggs can let bacteria in through the crack, whether that crack came from being frozen or from being bumped on something. That could be a reason to avoid eating them.
Sometimes...
The cracked open shell is the usual way I know an egg is frozen.
Any egg with an un-cracked shell goes in the fridge with the other eggs, and I haven't had any problems from them. Either they didn't freeze, or they partly froze but then thawed again with no problems before I was ready to cook them.
I think it must be different for some packs than for others.
All the ones I've seen call for a tablespoon or two of vinegar, then enough water that you can submerge an egg in it.
Edited to add an example:
https://www.walmart.com/ip/PAAS-Deluxe-PDQ-52pc-WM-Dom/17726024392
At present, I can zoom...
I can find a scientific study that says hens prefer "large" roosts, but it is no help for which side up to put a 2x4.
https://www.sciencedirect.com/science/article/abs/pii/0168159190900134
"Preferences of hens for shape and size of roosts"
Authors H.K. Muiruri, P.C. Harrison, H.W. Gonyou...
What I have done with home-raised chicken eggs, that may start out dirty:
Wash the eggs first (until they look clean)
Boil the eggs
Cool the eggs
Dye the eggs
More details:
To "wash," I just rinse each egg under running water. I rub it gently in my hand while I'm doing this. It usually doesn't...
I've eaten plenty of laying hens. They tasted fine to me.
Because they are older, the meat will be tougher than meat from young chickens. So they need long slow cooking with plenty of moisture. Some recipes were traditionally made with old chickens (examples: coq au vin, chicken & dumplings).
Some things are relatively easy (one set of genes, one color name, no confusion).
Unfortunately this is one that has a lot of different names and terms for what is pretty much two color patterns (the one in Welsummers and the one in Bielefelders) with minor variations in things like how dark...
In the pictures of your nests, I see wood pellets and sawdust.
Maybe the hens want a different material to make their nest?
You could try offering something different, such as a big handful of hay in one nest, and see if it makes a difference.