Hey, One of my hens has become ill this week and I wanted to get some advice from the community. We noticed her cheek had become puffy and at the time we saw something black protruding from the corner of her beak (not shown in pic / since removed), we removed it and seemed like a seed that had gotten lodged. After a day the swelling had not improved and upon further inspection seems there was more going on inside her mouth. We suspect this is a canker, but given they drink mostly rainwater, which wildbirds also have access too seems could be a few different diseases. Has anyone had any experience with something similar? Our other two hens are not showing any similar symptoms. I've since removed their rainwater and replaced with a bowl from mains water.