i agree that it is probably a chicken. My chickens won't break eggs, but if one drops and breaks, or someone lays a shell-less egg and they see the yolk, they will eat it.
It may not be a big problem at this point. Maybe one of the chickens had her bottom hanging outside the nest box when she laid and it fell and broke. And yes, they will eat every bit, even the shell.
It may not be a big problem at this point. Maybe one of the chickens had her bottom hanging outside the nest box when she laid and it fell and broke. And yes, they will eat every bit, even the shell.