is your suspected egg eater low or high in the flock? as especially if this one type of egg in one spot isnt eaten could be hers, she is laying away, and others are attacking her in nest box when she tries to claim, lay, and announce her egg made pride (had a hen who was low on pecking order before got the two new hens, who was hiding nest and eggs out of the way, and started stealing eggs apparently to fill it, damaging some seeming by accident). ive heard of hens kicking out and destroying the eggs of others to make nest in that spot, but eating could be secondary or even by other hens to then. try separating her to a cage with a nest, see it it continues, and then just open the door to see after found out, to see if she accepts that nest, and then can just put it were you want (also do the dummy egg at first for her to see if will help show to lay their, then she will always have an egg, maybe slightly broody, but as long as has the one egg but others taken she will keep trying to fill up that clutch). also never let your hens actually see you taking out real eggs or replacing/ putting in dummy eggs, as many probaly will have no trouble, but found with brilliant game hens, they watch everything you do, and dont like to the degree they get wary of certain things, thus the egg hiding (how i ended up with five clutches of eggs hidden and then hatching and only finding the two after moved something and found mamma had been hiding them for days from me when i went out, though happy the couple brief chirps i heard muffled werent just in my head).
