Hi! I am wanting to come up with some way to mark all of the hens that use the nest boxes. About a month ago I bought 25 hens from a friend of mine, and am getting about 13 eggs/day. I'm quite sure that some of the hens lay VERY well, and others I don't think lay at all. My original flock of 40 hens give about 32 eggs/day (same diet, etc.). Since coop space is at a premium for me, and I'm selling all of the eggs I can produce, I'd really like to be able to cull any low producers, and replace them with some young pullets. ANYWAY, my brother thought maybe I could dangle a permanant marker in the nest box, and mark them that way. My concern is that within a few hours, the marker would dry up too much to work well (I'd also need a differant color than black, as most of the hens are BR and BA ). Any ideas would be very apreciated!!!