My Toulouse Goose has developed a large lump (goose egg sized, no less!) on her breast, left side. We've been keeping an eye on it, it hasn't changed in the past several months (she's about 10 mo. old). Now it does look like it's getting bigger, and is red, losing feathers on it. Hoping it's not a tumor on my poor Georgette, as does her mate, Lautrec. Any opinions? What to do? She's never laid eggs.