You may not be able to tell by examining her because the egg could be farther up inside her. But I would definitely give her daily calcium citrate+D3 tablets and see if that helps her pass an egg. This kind is best:She has laid before and her eggs were always extra large. So I thought about that but she isn't walking differently. Runs around with the others. How would I check for that?
Give her one tablet daily for a week. Go out to the coop with a headlamp after dark, catch her, then open her mouth and place the tablet at the back of her tongue. She should swallow it no problem, and the more you do it the easier it gets.
