I think I heard of this happening to turkeys not chickens . It’s not uncommon in insects .....
Par·the·no·gen·e·sis
/ˌpärTHənōˈjenəsəs/ noun
BIOLOGY
reproduction from an ovum without fertilization, especially as a normal process in some invertebrates and lower plants.
"cyclic parthenogenesis is well displayed in aphids"
Par·the·no·gen·e·sis
/ˌpärTHənōˈjenəsəs/
noun
BIOLOGY
"cyclic parthenogenesis is well displayed in aphids"