each hens egg will look different than another hens egg. I'll bet you have three different looking eggs. The photo shows she's more than ready. The only reason she may not be laying is due to the solstice. Either supplement light or wait for late January to Feb. for her to start.
My birds are late to mature and my geography such that if they are not laying by early October they won't lay until spring. We don't bother with supplementing light.
My birds are late to mature and my geography such that if they are not laying by early October they won't lay until spring. We don't bother with supplementing light.