Yeah, I ended up exchanging it out. I usually feed my own bred rats, but they're between litters at the moment so I needed something. The associate said it's just a tumor and won't hurt my snake, it's just a lump of *puss and stuff* and it's fine to feed. Um... he didn't pay over $500 for the snake he's feeding it to lol. I used to work in a pet store, I've learned to take their advice with a grain of salt.