If both vampires have enough blood in their system, then nothing. However if the vampire who is being fed from has little amount of blood in them, then they will become weaker when the blood has been drained from them.
The vampire who is feeding from them will get slightly stronger from drinking the blood, but not as much as if they were feeding from a human and it was fresh blood, as it has been going around the other vampire's body, making it less pure.
No, a vampire bat doesn't eat anything but it sucks on the blood of mammals such as cows and pigs.
I guess it is possible for that to happen, but unliekly
If my friend was a vampire and ever threatened to suck my blood, I would just ask him to turn me in to a vampire.
It dies.
Edward is the only one who thinks that Bella should not become a vampire because she could get killed when he bites her. In the first book James bites her and Edward sucks the blood out of her veins so that she would not become a vampire. Edward will always love her, and in the end, she becomes a vampire anyway.
Vampire AcademyHouse of NightDraculaP.S Twilight sucks!I would also add maybe Vampire Diaries, Night World, Blue Bloods, and Anita Blake series
They would just get a scar that would never go away
Well it's a guess, but since at the end of the original the girl is a vampire it would make sense for that too happen.
He would regenerate.
it would if they existed.
Blood Lots of jars of blood
A person killed by vampire fangs would die from blood loss.