Chard, too. and its prettier, if you care about such things.I buy kale in the grocery store when we run out here. They love that so much and it's outstanding nutritionally for them. We grow it but this year there wasn't enough to bother freezing it.
I either hold the bunch out and let them all eat it while I hold it, or tie it with twine and hang it.
Otherwise, they get nothing else but feed and occasionally some scrambled eggs if they lay too many lol.