Yes you run the risk of disturbing her enough she looses her broodyness. I would only go in when I was bringing fresh water and food, and look at eggs then. I have used both pencil or marker on both chicken and quail eggs, marker dries so fast it doesn't seem to harm the embryo by leaching...
The other girls kept laying eggs in her nest, so it was a few days before I started marking the eggs and taking away the extras. I think I left her with eight eggs. Six chicks hatched, but after a few days one mysteriously disappeared. I never found any sign of it. There's no way for anything...
This was the first time she went broody in June. She was surrounded by clumps of sod, but I couldn't water the grass while she was sitting so it all died. She is definitely broody again, mid September and the nights are cold, so I hope she shelters the babies longer than she did the first bunch.
I'm sorry your quail got off the nest.
I have a coturnix quail that went broody in the summer and raised five chicks. It's really tough love with quail, she protects him fiercely for about a week, not so much for the next week, by the third week they're on their own. But it's September and...
There were 2 males, which are still close enough to hear them calling all the time. And 7 female. There was grass hanging over the nest, but it dried up and died. I was trying not to disturb them too much but the others still kept coming to lay in nest, so I marked original eggs and when I bring...
It is a 6ft by 12 ft triangle, just under 5ft at peak. I have been tossing in sod I have dug up from lawn to make vegetable beds so ground is all lumpy with lots of holes... It is like an Easter egg hunt looking for eggs. In early spring the whole thing was covered with clear vapour barrier...
Today is day 8 of my coturnix sitting on a clutch of eggs, and there is a second female that sits on eggs when she gets up for food and water... I took the males out at day 2. Should I take out the non broody females?
It's not really an egg... It is cancerous growth of tissue. If it is crunchy it could have calcium deposits. My poor hen had growths and cysts on every organ when I did her autopsy.