Granted that is some gradeschool-level writing but if you click around just a bit you can see it was written by a professor at the University of Louisiana. The info there is kind of sparse (and includes WAY to many "probablies" for my taste)... but that article is also 13 years old.
I stumbled on a feeding video yesterday that might be what you're looking for: http://youtu.be/FFW5Iat82TI?t=1m51s It's a little graphic, but basically the mouse coughs up blood (and its eye looks bloody too) immediately upon constriction and it dies very quickly afterwards. Someone more knowledgeable than me can interject and explain what happened there, whether it's broken blood vessels, cardiac arrest, etc.
I've seen that too. Interestingly enough, most people who see the slaughter process continue to eat meat afterwards.Nothing is wrong with killing. We as a civilization have gotten away from the killing of are own food and it has made us soft. Its like they say if slaughter house had glass walls more people would be a vegetarian.