CR, your third comment re: the snake not recognising a rodent as food if it's not warm is not quite true. Smell and sight also play a big part in food detection for pythons - if you offered a snake a piece of plastic warmed to 35-40C, and completely devoid of rodent odour, I wonder it if would go for it? I have several snakes here that will take room temp (cool or cold) rodents without fail. Certainly temperature contributes to the appeal of food, but captive bred snakes are used to a wide variation in feeding techniques, and seem to survive OK.
Temperature is just a parameter that may be worth considering for fussy eaters.
Jamie