My 3 year old Willow has brown feathers coming through. She has always had some but as she ages, there are more. They are mostly on her chest but there are some on her wings too. She generally only eats seeds. I’ve tried every to get her to eat fruits and veggies to no avail. Has anyone else had their birds feather turn brown? She has free roam of the house during the day and goes in her cage at night.