I give mine oatmeal as a treat on cold mornings, invite their favorite people over every year for their adoption-day, and sometimes take them inside when the weather is nice for a little spa and checkup. The spa consists of an epsom salt bath, oats to snack on, and a blowdry. Depending on whos getting a spa, sometimes non toxic sparkle blue nail polish too. Not all of them like the polish.
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Forgot.to add that I bribe them to go back in the coop, and have Hazel trained (not the one in the photo) to hop up onto the roost, and eat her snack off of my hand.