After a month or so of laying with only 3 eggs outside the nests (but in the coop) I suddenly found a single egg in the run. It was laid in a place where they like to dig and take dirt baths. I don't know if it was a chicken that's been laying for a while or if it's someone's first egg (the most we've gotten in the nests so far is 9 from 11 pullets-they are about 24 weeks old-but only one time-mostly it's 6 or 7 a day). Either way is this anything to be concerned about? Will whoever laid it be likely to lay in a nest eventually?