I had never heard that that term and had to look up "trapnests". I hate when some band gives themselves a wierd name and then they are the only thing that comes up in searches. I did find one that actually defined it That would sure come in handy. I have one Marans hen that I think is laying plain old light brown eggs and I'd like to know which one it is. Do you know of a site that might have more info on them?
Some put food color on the vent and then look for the egg with the color on it. It has mixed reviews though.

