Yes, ducks can have romaine lettuce, and it’s a safe and healthy treat for them! Romaine lettuce is a good source of vitamins A and K, as well as folate and fiber, which support digestion and overall health. It’s best to offer romaine lettuce fresh and chopped into smaller pieces to make it easier for ducks to eat. https://factaboutpets.com/can-ducks-eat-lettuce/