Make sure she knows where the food and water are ... and don't move them. If her scissor-beak isn't too bad, show her how to use a nipple waterer or hamster bottle. Those don't generally move around, so she'll always know where to get a drink. While she's little, use a feed cup attached to the wall. Those are harder for other birds to knock around. If her scissor-beak is really pronounced, give her soupy-wet feed while she's small, like a gruel. Be patient and consistent. She'll figure it all out. We had a blind chicken for years. As long as she could hear us talking, she'd follow us around and come sit in our laps. She'd follow voices right into the kitchen ... much to my father's chagrin!