Prekilling a live rat

So for some reason the store was out of frozen ratpups, but had live so when I get home I have to murder it because my snake has only had ft and doesn't even constrict ever she just grabs them by the head and eats, any tips on killing it?

What's the most humane way?

there is a video on you tube involving dry ice, very humane

droid!

put a ruler or somethin heavey behind its head and pull on its tail to seperate its neck, very quick and humane

justin

x2 for the Dry Ice. By far the most humane way in my opinion.