User blog comment:Gcheung28/Twilight Saga Quiz/@comment-58.175.26.229-20121120054023/@comment-3412402-20121128205236

Rosalie did kill Royce and his friends but she didn't drink their blood. She said she didn't want any part of them inside her. She must have killed them without spilling their blood b/c I don't think a newborn could stand being that close to human blood without succumbing. It never explicitly states that Alice drank human blood, but it's implied that she did when she was a newborn, but she quickly switched to animals after having her vision. As far as the others - Edward, Esme, Emmett, and of course, Jasper - it pretty much states that they have drank human blood before for a time, when they were newborns and slipped up. Of course, Jasper lived that way for a long time before he changed.