Those squares do not look small to me.
I see openings of graduated sizes, ranging from 3" by 6" (the smallest) to 8" by 6" (the largest, which is big enough for some adult chickens to go through.)
Those are all bigger than the 2"x4" rectangles you mention as a comparison.
Personally, I would go...
I agree with you about not seeing the thickening that is common with the pea comb gene. That is a large part of why I thought it was probably single. Yes, I've also done some pea/single crosses and seen a variety of wonky comb types, with the actual single combs standing out in two ways: they...
A Brahma is supposed to be pure for pea.
Given that a split pea/not-pea looks different, you should not find that in a pure Brahma.
A Brahma who is pure for pea comb cannot produce a chick that is pure for single comb. Just not possible.
To me, that hen looks pure for single comb (no pea gene...
Brahmas have small pea combs. That hen has a big floppy single comb.
She's also missing some foot feathers (Brahmas should have quite a few more), and it looks like she has white feet (Brahmas should have yellow feet.) The black in the feathers doesn't look quite the right shape either, and she...
It is a "rule of thumb" or guideline, not an absolute rule.
And it was around long before social media (I know I've seen it in books published 30 to 50 years ago: just not sure of the exact dates.)
Apart from what constitutes a "proper run," time in the coop also varies by climate and by how...
If they have to stay in the coop during bad weather, they need the larger amount of space, and sometimes even more.
If they have to stay in the coop after they wake up in the morning, waiting for you to come open a door and let them out, they also need the larger amount of space.
Given how big...