My 1 year old duck has been acting a bit weird, he hasn’t been eating his normal pellet food, while my ducklings are still eating it just fine. Recently, I’ve fed him things like live and dried meal worms, peas, lettuce, and a few minutes before the photo pictured was taken, spinach. I just want to know if anyone can give any insight about what the issue is, for about a week all he wanted to eat were the live worms and nothing else. He’s kept inside for now since it’s winter here