Hello and welcome to BYC, its great to have ya here! :welcome:frowThere are a lot of quail keepers here as well! Our members keep poultry of all kinds, even pheasants, emus, peacocks etc. ☺️
Sometimes I do bake eggshells too. You can try 365 degrees for about 15 mins- then crush in a baggie, or with a mortar and pestel (don't know how to spell that lol.)
I had a white rock named Agnes as well.❤️
Definitely do the calcium citrate pills as Eggcessive suggested. They really help.
Do you offer supplemental calcium to your chickens free choice?
My bad, I did not see the first pic in the original post. My computer did not load completely lol. The black one, I believe is female. The chocolate orp is questionable. Marans sometimes have larger combs, at least IME, so pullet's combs can develop as fast or faster than roo combs.