aapoole
In the Brooder
my incubator has a plastic mesh floor it does have small square holes but the day I take the rack out I put down paper towels so their feet do not go through. I do not believe they are imbred, I get all my eggs from a licensed breeder. He said he thought they could just be hatching too early but still I don't think I would have 1 every time hatch early. I bought a new thermo/humidity reader to make sure that isn't the problem.What's your incubator floor lined with? Have you been inbreeding? Or it could be linked with some vitamin deficiency in your adult birds. I think you can try to help the quail by making a sort of shoe for them. I've put some links below but you can search online for 'chick curled toe fix', there's a lot of information regarding this.
https://www.mypetchicken.com/backya...-toes-are-all-curled-up-whats-wrong-H293.aspx
https://www.backyardchickens.com/t/51112/chick-with-curled-toes