Hello, A couple of days ago I noticed that my dog has a lump on her ribcage. It's about the size of a 50p (maybe a little bigger) It doesnt seem to cause her any discomfort - even when you touch it. Also her personality hasnt changed and she still eats and drinks as normal. I was wondering if anyone had experienced this with there dog? Does anyone know what it could be? Thank you. YellowFlower.