I hatched out a few of my fils eggs this past month. when we gathered them from him, i labeled his eggs with the name of his rooster with a pencil so i could keep track of his and mine( i drew googly faces on mine just to be a dork) The problem is, hes got super- duper chick fever now and he brought up 15 eggs this time( almost half my bator!) and they have what looks to be a marks-a-lot marker writing on them. i doubt its a sharpie, i never see one at their house, only a marks-a-lot. Will this poison his eggs?