So my troublemaker duck Chloe has a nasty scab on the front of her ankle. Not sure what she got herself into but it started out as a callous looking area and now it looks like a barnacle. I've been cleaning it with Vetericyn and applying silver sulfadiazine cream once a day for the past 2 days, but every time I clean the scab it bleeds. Today it started bleeding when I fed them peas and they were stepping all over each other. So I cleaned it again and a huge chunk of scab fell off. Bloody underneath. Applied cornstarch to stop the bleeding then silver honey cream and put her in the pen for the night. Any ideas what this thing is or what I can do to help her? She's not limping and it doesn't seem to bother her. Thanks in advance!