Last week, I introduced 4 new hens to our flock. The next day, our 2 older girls that still lay eggs, laid an egg. (I assume it was already in the shoot.) Since then (a week) however, NO EGGS! Apparently they are on strike, a picket line of sorts, a line in the sand has been drawn and they apparently are not budging. How long do you suppose they will hold this grudge?