Hello, our female swan has a lump under her chin and I was wondering if you could give me an idea of what this may be and what I need to do? I read on another site that it's very possible that she has a wad of grass, etc under her tongue. The photos they show with the information is how she currently looks. She is eating well and doesn't appear to be in pain but I know that this isn't normal and the lump has grown the past few weeks. Thank you.