My Salmon faverolle has had this yellow like growth inside the side of her mouth. If I rub it off with a q-tip, the area bleeds for a bit and days later, it comes back. The pic here was a bit further down her throat. I was able to pull it off with a q-tip. It has a rubber like feel to it. Any ideas as to what this is? How she got it? How to get rid of it? Thanks in advance!