I noticed a couple of days ago that my four month old Barred Rock seemed to favor her right foot slightly. Today when the girls were out in the yard I noticed Penelope was holding her right foot up. When they returned to the coop, she had a defined limp. I just brought her inside to take a look, and noticed the foot was swollen to twice the size. I palpated for fractures, but couldn't find any misalignment. She was sore in one spot, but I saw no signs of any penetration, now broken skin, no external injuries. The swollen area was soft but not particularly hot. I will attach a couple of pictures to help with potential diagnosis and treatment.