A few months ago one of my chickens got sick. I seperated her from the flock and put her on antibiotics. During the time she was seperated the others started laying their first eggs. She ended up laying 2 weeks after I put her back with the others (about 3 weeks after the others started laying) Since she started laying, her eggs have always been smaller than the rest. She is the same breed as 2 others so I can compare (Americanuas). Also at first her egg shells were pretty thin so I gave them oyster shell to munch on. A few months later her eggs are still smaller than the rest and I notice her egg shell is also rougher (calcium deposits) almost like sand paper. Does anybody know why this would be? Does anyone have any suggestions on what I can do to at least help her eggs become smoother like the rest? Is she damaged forever because of the antibiotics? I appreciate any feedback, Thanks!