I have a hen the just started to limping today and doesn't walk much. There's a lump about the diameter of a dime on her right leg. It feels pretty solid...a bit dense but not rock solid nor really soft i guess. No odor, no discharge, no broken skin and no brusing. Almost like a little balloon. I can easily move it around too. What could it be? A cyst? If so then from what? I know the pics aren't the best. I'll try more later. Thanks for any help.