Hey Everyone! I have a Pekin duck--probably about 3-4 years old. I've noticed she isn't walking well--after looking at her, it appears she has a large amount of fluid on her knee (circled in green in picture). We drained some of the fluid & it's yellow liquid. This is the 2nd time this has happened to her. Right now she is on penicillin--anything else we can do besides drain and treat with meds? Looking at some other info--says that we can give her oregano--anyone know how much? Thanks in advance for the help!