[Cat15]

I believe that you've stated before that vampires can go six years without feeding without dying of starvation, but also that sun exposure accelerates their hunger. If a vampire gets about as much exposure to the sun as the average human, about how often would they need to feed without risking any negative impact upon their 'health' (aging, being weakened by hunger, etc.)?

How quickly does blood lose its potency as a source of focus for vampires once outside of a living being/after said being dies? Is it a matter of seconds, or perhaps minutes? Gradually over a few hours, etc.?