I have 5 7-week oldPekin ducklings. They are partially feathered. One has traces of blood on the tips of her wing feathers. What is causing this ? Could one of the others be picking at her new feathers ? I know that sometimes chickens will peck at new feathers to get the blood out of the quill. Its caused by a protein deficiency or boredom. Do ducks do similar ? Its only on the one duckling.