Lucy was spayed in October. When it was first done, she had a significant lump there but vet said not to worry because some dogs have a reaction to the suture material. Well, it did go down eventually but then yesterday I noticed a lump on her stomach. It is quite large (about the size of a silver dollar) and it is right where her spay incision was. It is a bit red right there but doesn't seem to bother her in the least. Does anyone have ideas? Should I just watch her for the next couple of days or does it seem like something serious?