I know, i m just posting because people revisit these if they have the same thing, more posts would probably give more information.
but, we never got what happened to the hen?
Could be a ingrown feather, or a very strange case of ear-mites. We had mites in their ears and bumps that kind of looked like it grew, but i doubt it is..
I hope it's nothing bad don't think it's normal with only one on one side