This is my first post here. We have 23 chickens: 19 laying hens and 4 roosters. The breeds include Leghorn, Australorp, Bared rock, Ameraucana, Dominique, and some mixes of these. We have never had a problem with our chickens laying until about 2 months ago, when we "adopted" 8 more chickens from our friend. 4 were from a brood of ours, but 4 others were completely new to the flock. Well, since we adopted these chickens, EVERYONE has pretty much stopped laying in the coop. We are lucky if we get one egg a day- with 19 laying hens! I realize the weather has gotten colder, and the added stress of new chickens may have slowed production- but to only one egg a day? And it's a different color egg each day from white to brown (but no green). Before the "chicken adoption", we were getting a steady 8-9 eggs/day including green. We were concerned that they were laying somewhere else, as we found a pile of ten white eggs under my husband's tractor. We have search everywhere the chickens go (they are free range), but cannot find eggs anywhere! We have a big coop, with 8 nest boxes, and added a nest box outside in the woods where they hang out thinking they wanted somewhere more private- but no one has layed there. We have found egg yolk in one of the nest boxes, we may have an egg eater on our hands. But could she really eat 19 eggs a day? Do you think more than one chicken is eating eggs? How are we going to figure out which chicken is eating eggs? And if it is an egg eater, why don't we ever find green eggs in the coop, only brown and white? Today is day 3 of confining them in the coop/run. So far we have only collected 4 eggs in 3 days, only white and brown. Still no green eggs... What is going on? Please help- we are at our wit's end!!!