marking eggs

[yellowfacedviolet]

For those who mark eggs in a clutch, what do you use? Pencil? Pen? Marking pen? Other? Are there any toxicity issues to consider? I usually just leave a series of small dots with a marking pen, one for the first egg, two for the second, etc. Curious what others do.

[starlingqueen]

I used a water based felt pen like crayola. As long as they are water based there shouldn't be any problem. I think pencil would be too hard and may break the egg.