Droppings stuck to vent

by Susan

Lately our budgie has been plucking the feathers around the vent area bare. Recently we have noticed droppings stuck to the vent area. The droppings are black and tarry, not green or runny. Our budgie is female, approximately nine years old, and has been in good health up to this point. She is on a seed diet with a vitamin supplement added to her water. We have offered her fresh fruits (apple, banana, strawberry, melon, peach), vegetables (broccoli, spinach) and boiled egg yolk and would love to see her eat them, but she refuses them, plucking them out of her seed cup and throwing them on the floor. Her favourite treat is millet and she eats a lot of it. Do you have any advice? Thank you.