Well, as said i have stuffed the fresh mustard greens as they were into those one gallon zip-bags and just threw them into the freezer in fall. They are now somewhat brittle now and when i break up a portion for the duck's supper bowl the plants break into little bits and pieces which they eat. I make duck-soup every evening in a square planter: Cat Food, Cracked Corn, BOSS, kitchen scraps, and some extra like Cabbage, Kale, Mustard-greens, cooked rice, pasta or bread. Within the soup the ducks eat almost everything.
