I noticed this morning my 9 month old hen can't walk straight. she's using her wings to balance. She was ok yesterday. She is thin. I usually get three eggs a day (three hens in pen) but lately there are only two. my husband saw a soft egg on the floor a week or so ago. her vent looks normal. she has feathers missing on top by tail. I assumed that was from an overly aggressive rooster, I've since rehomed. It's melting snow like crazy here and they have been digging in the water puddles in their run. Is this possibly coccidiosis? I haven't observed her poop yet. just brought her in.