Why does your female white duck has feathers missing?

Your female white duck may have missing feathers due to molting, a natural process where ducks shed old feathers to make way for new ones. Stress from environmental factors, such as changes in habitat or diet, can also lead to feather loss. Additionally, feather pecking from other ducks or health issues like parasites might contribute to this condition. It's important to monitor her health and consult a vet if the feather loss continues or worsens.