Same for mine!! I've had many unripe melons this year from my garden and I fed them to my chickens. Great treat for the summer, too, because they love drinking the juice...Very refreshing for them! My chickies also get a few raw eggs a day, because one of our hens was on meds a while ago so we can't eat any of our eggs (all of them are the same color so we can't tell who's whose egg.)they might enjoy cabbage or kale.
not a vegetable, but my chickens like watermelon.