Sophie has a lump on her right under side. I took her to the vet for a check up and asked the vet what it was. He said it was a floating rib that I was feeling. I believed it at the time but felt it more after getting home and it is really soft and not near her ribs. I'm taking her back to the vet next Thursday anyway but hate waiting and not knowing. The lump does not seem to be bothering her, its not red, its not pulsating or anything. Does anyone know what this could be?