Sandpaper eggs

[Jenbirdee]

I have three chocolate English Orpington hens. Two of them lay lovely, brown eggs the other one lays eggs that are very light brown, almost white, and the shells feel like sandpaper. She also frequently has little dark spots inside her eggs.
Wondering what’s going on

 

[Mrs. K]

a glitch, it will probably go away, may come back again, it just sometimes happens.

 

[Jenbirdee]

a glitch, it will probably go away, may come back again, it just sometimes happens.

I feel bad for her because they probably hurt coming out and she has been doing it for a few months . I had hoped it would’ve just gone away by now. Maybe I’ll give her a little poultry cell vitamins I don’t know if it’ll help but it can’t hurt I guess