Hmm, I've actually had a similar experience back when I was living with my ex. He's the one who got me into snakes, and he had this male pastel bp that was a voracious eater but he was usually fed live rats. Well, one day we brought this medium rat home from the local pet store (again, like you said, they had just received this shipment) and threw it in the feeding container with the snake. Of course, being the garbage disposal that he was, the pastel struck and coiled... but as the rat was dying it... well... had some really nasty diarrhea The pastel did hold on and wait til the rat was completely dead, but then immediately uncoiled and couldn't get away from it fast enough. I mean, I've never seen a snake actually sprint away from something, but man he was up and over the side of the feeding container in a second, hissing and very agitated. And then none of our other bps wanted anything to do with it either so we had to throw it away.

Now maybe it had something to do with the fact that this nasty wet stuff was suddenly all over him, but I also think they can sense when there is something wrong with the rodent and it just wouldn't be good to eat. So that could definitely be what happened with your bp too. I mean, your rat could have just died from shock or something related, but I'd say it sounds like there was something wrong with it. And yes, sometimes it does seem like bps get used to a certain color, so if you've never fed a hooded rat before she could have been scared of it. Maybe a hooded rat is the type that gave her the scars. Who knows?? At least now you know to try and avoid hooded rats