I have 3 isa browns and 3 golden comets all laying an egg everyday. I also have 4 crested magpie ducks a magpie drake and 4 buff ducks a mallard duck and a mallard drake. Now the weird part. My chickens are laying eggs with bullseyes in them like their fertile. Not a solid dot but the very distinct dot with ring. I do not have a rooster and no roosters around. Anybody else ever seen this? My wife thinks my drakes may be doing this but the chickens and all ducks usually stay pretty well within their own groups other then feed scrap times.