My canary has been making this noise for exactly a year now but only at night and mornings when he would wake up. Someone told me the noise is teeth grinding. However, he is molting right now and making this noise all day. Idk if it's because of the stress from the molt. He is eating and drinking water very well. So I am not sure if I should be worried. No other signs or symptoms are shown. No diarreah and stools are green with white urates.