@cheezenkwackers If I were you, I'd stop feeding pea's for a little to see if problem resolves or at least dramatically slow down on the peas. Maybe try giving them a different treat for a while or a new one every day to expand their diet.
https://www.backyardchickens.com/threads/the-ultimate-list-of-duck-treats-and-supplements.242460/
This list of duck treats is super helpful!
https://www.backyardchickens.com/threads/the-ultimate-list-of-duck-treats-and-supplements.242460/
This list of duck treats is super helpful!