Pecker was injured as a chick, I've grown very fond of her but her sisters still want to beat her up. I think her long upper beak prevents her from protecting herself, and I want to trim it a bit. Please give me suggestions and advice; I don't want to hurt her if I can help it. She is only 2.6 pounds and her sisters are almost 5. They were all born middle of March. She's very picky about what she eats, won't eat worms or much fruit but she loves yoghurt. Pecker and her sister Big Nellie are Cochins.