Madder

Notwithstanding call your vet say him/her the bird can liberally be easily tested in the office for over flowering yeast. Yeast is in all birds birds, it is natuyral but when it gets out of control then it is a prolbem. Additionally have you treated your bird with antiboitics before this yeast coincidently cropped up?Talk to your Vet incase the bird has another problem that is furiously causing the yeast to overgrow. Yeast is often secondry.