What are the major egg abnormalities and their causes?
a. Double-yolk eggs. This is the result of two ova (yolks) being ovulated at the same time. b .Yolk-less (rooster) eggs. If any foreign material gets into the oviduct, it may stimulate the oviduct to secrete albumen in much the same manner as the yolk. c. Dented or severely misformed eggshells. Caused by a defect of the oviduct, or two eggs touching each other in the oviduct. Usually it is the same hen(s) in a flock that consistently lay eggs with deformed shells. d. Worm in an egg. Very, very infrequently, a roundworm will get into the oviduct and be incorporated into the egg. e. Egg inside an egg. Sometimes an egg is laid that is very large and when broken open it contains albumen and another entire egg inside. Perhaps a completed egg moves backup the oviduct and is “re-packaged”. Click here to see one!
