We have 26 total birds in our coop. 4 white Columbians, black sex links, Plymouth Barr and silkies (not sure if they are hens yet) 2 Murdoch ducks and 2 Americana. None of these birds are older than 16 weeks. I have 5 older hens that lay big eggs 2 brown and 3 blue. However some days i have been finding 3 brown eggs laid but they are all the same size. Yesterday we found a very small brown egg on the floor of the coop. Who laid it??thought maybe a silkies but they are only 3 months old and the big one are only 4 months??i think we have 2 or 3 new chickens laying just unsure who and who is laying these peewee ones?