ok so one of my chickens is growing a horn type bump on its beak. the other chick of the same breed does not have a bump so im not sure if its a gender thing or just a deformation...i believe they are easter eggers, they were abandoned in my yard so i dont really know for sure. in the picture its the white bump on the top of its beak just under the red. it is raided up and hard so i dont believe its an injury but it really looks like my chicken is part rhino lol. any ideas what it is?