Sorry if this has been asked and answered. I searched and couldn't find it. I have 13 chickens and only get about 5-6 eggs per day but would like to keep track of what's laid when. I read about the laser deal but that doesn't seem feasible for my small scale. I was numbering egg cartons so I knew which were the newest. This is small scale so I don't fill a carton a day to date that carton. I also don't want to write on them for future sale reasons. Hope this makes sense. PS-So grateful for this website. I can't tell you how many times I've had a question and log in to find someone else had the same one! Thanks!