OK...the saga continues. Out of 41 pullets, I had my first 3 eggs from Aug. 10th through the 14th. I haven't had an egg since - over a week. The girls are all just over 19 weeks old. I'm guessing it's one (or more) of the reds as the producers since their combs & wattles are the brightest and I've seen 1 of them sitting on top of the nest boxes (where the 3 eggs were found). I've tried leaving the flock in the coop until after noon - no luck. I've seen the red sitting on the box, wait a good half hour only to find her off her "nest" and no egg. That has happened at least 3 times in the last week. (There is no sign that the egg was eaten either -no shell, no mess.) I can tell that the others are checking out the nest boxes because the shavings are rearranged and the wooden eggs & golf balls are moved around.) Now, today the girls were in lockdown until 12:30 (red was on her "nest" this morning, but no egg again). They were out free-ranging for about an hour and I hear the tell-tale egg song coming from the edge of the woods they hang out by. By the time I got there, the singer was done, so I don't know who the soloist was. Looked high and low on the edge of the woods and in the woods a few yards. The only eggs I got are the welts on my legs from the mosquitoes! I see my two options as 1) Leaving the flock in the coop all day long with no outside time or 2) making a makeshift run for them so they can't get into the woods and have to stay close to the coop. They currently range on about 3 acres around our home, workshop, garden and lawn...they really love it & I enjoy seeing them contently roaming, but this whole invisible egg thing is driving me nuts! Anyone have any other ideas???