I got a great deal on fresh mustard greens and bought several bags. After all, they look just like Collard greens which my geese adore. Wrong answer. The geese wouldn't touch them. One bite and they spit them out and they are still laying out there on the ground in the goose pen. Fortunately, ducks like spicy food and they gobbled the mustard greens down and looked for more. My rabbits ate them, too, after glaring at me and making disgusted faces at every bite. So, I guess mustard greens are off the shopping list.