Hi, one of our hens has recently become lame. We had a look a couple of weeks ago and couldn't see anything wrong - no swelling, heat, everything seemed to be working as it should, nothing in her foot etc. This weekend we had another look and her knee joint has become swollen and the limp has become worse. She is still with the other hens and is eating and drinking as usual.
Has anyone got any experience of this or have any idea what it could be?
Thanks in advance.