I have a sad Petco story:

My hubby and I were looking at the ball pythons one day and the first one we picked up had a big gash in its side near the tail and it's body was very lumpy. Not egg lumpy (she was a hatchling) and not soft lumpy, but HARD lumpy. Like bones. I don't think it was her bones, and I don't think it was bones from a meal, because I've never felt that on a snake before. It was so sad. I told the people and they took her and said they would take her to the vet. But who knows if they really did or not. They probably just put her back in the cage after we left.