I see quite a few posts on the topic so I apologize for the redundancy. I put my 37 chickens and 3 ducks into the coop around 6 and no one had any problems. I went in around 7 and noticed the 12 week old female Swedish duckling is not using one of her feet and was jumping around on one foot. Even though she hates being picked up, I inspected her foot and didn't see any odd swelling or bumps or anything in the foot. I put her down and watched her and she just continued hobbling although she started using both feet. They are all fed medicated Purina Chick starter and they all free range as a flock from the morning until the evening. The other two ducks (a female Pekin and a female Cayuga) are two weeks older and exhibiting no signs. Is this most probably a sprain or something else? Anything specific I should be doing?