I'm not sure, I mean I've never heard of a rat pup surviving 10 minutes of being constricted. If he doesn't eat it, and it's still alive, you can euthanize it yourself. Most people use CO2 to prekill their prey, some people put them in the freezer alive. I personally can't do that stuff, so I would return it. Not sure, the last rat any of my snakes refused live is now my pet, so I guess it's whatever you're comfortable with.