Whistling noise when breathing?

[Chickenmarsala]

Hi everyone!! So when my duck breathes a whistling noise comes from his nose. He has pretty much always done this since he was a duckling, so I haven't thought much about it. However, recently I feel like it has been getting worse. Any idea on why this could be happening? He has access to water right by his food. Thanks!

 

[Miss Lydia]

Water deep enough to dunk his head and clean his nares? If so and he is acting normal eating drinking doing all things ducks do it could just be him. I’ve seen members say their ducks snore. How old is he?