Pet sedentary

Professor: Had those before?
Brenda: Yeah. They're Pop Rocks; they crackle in your mouth.
Professor: Eat some... thirsty?... What's wrong? Something you might have heard about mixing Pop Rocks and Soda?
Brenda: Well, supposedly, your stomach and your intestines and everything bursts. 
- Urban Legend

Helen wants something cleared up. She writes:

I've just had a charity collector from the RSPCA knock on my door. He said that there was a big problem in the area with people having their cats stolen cats paws superglued together, and then used in dogfights. Can this really be true? Has anyone else heard of it happening?