How do you keep track of which of your collected eggs is the freshest? I've only had a few so far, so I've put them in an egg carton and its easy to tell the freshest eggs based on their position in the carton. But as I only have one laying hen so far, with five more to start in the next couple of months, I can picture a time where keeping track of the freshest eggs will be more difficult. In terms of wanting to use the oldest eggs first, or sell the freshest eggs if I ever get that many, I'm thinking a way to mark the eggs to keep track would be a good way to go. I thought about writing the date collected in pencil on the shell - does anyone do this? Or what other method do you use to keep track?