People keep saying that enclosure feeding doesn't lead to cage aggression, but I do have one big dumb male black pastel that exhibits CLASSIC cage aggression. If you're already having to use gloves, I'm going to argue that there's no harm feeding in a separate enclosure for a month or two, and seeing if that improves her behavior the rest of the time. (And if you do try that, and it does help, I'm going to also suggest developing a signal at the end of feeding, so that she knows eating time is over and doesn't go for your hand when you try to put her back. I use a cardboard box for feeding George: when I'm out of rats, I turn the box on its side and dump him out on the table. It ain't dignified, but at least George knows meal time is over and stops with the idiotic biting.)