My hen "Ginger" just started limping and hopping like this today. This morning she was fine, so whatever happened happen in the last couple of hours. Laid a beautiful egg this morning. Seems like it may be upper leg as she is keeping her right foot forward. Upon inspecting I do not see any signs of physical injury. Anyone have advice as to what this could be and what I should do? I'd like to help her as soon as possible so it doesn't become a longer term problem.