Was she eating rats previously for sure? For a timid snake, I'd try to get either a rat pup (crawler) or a mouse (young hopper)...something that won't fight back
effectively. Maybe she will gain confidence that way? Not that I can speak for scrubs (no experience with them) but some snakes just need to get a taste of the
right thing, something they can easily over-power before they move up in size.
And as with any snakes, feeding regularly comes before any handling, especially such a high-strung species.