...I'm not trying to give the impression that I can't figure out to put males in one tub and females in the another. I'm talking about special circumstances like I just ran into when I wanted to mark the one female in the bin that hadn't eaten.
I remember a while back watching a video on youtube where a guy there needed to mark a specific hatchling put a small mark on its back with a paint pen and said it doesn't hurt anything and comes right off with a shed. I just would like to make sure that is true.