I did have in my last place. Found tiny holes in the eggs almost every day. Had about 20 hens, various breeds so I split them into two groups then again, and again. Eventually over a period of time and through elimination discovered it was just the one hen. She was separated for three weeks on her own. She never touched her own eggs, in fact was sitting on them, so I then put her back with the others and never had another chipped egg.