They love any kind.. mozzarella, cheddar, cottage cheese, cream cheese, cheese curds. They also love plain yogurt, but prefer the full fat kind, and sour cream.
Ever since I lost a beloved hen to sour crop I try to avoid giving my chickens anything with sugar or yeast. I'm not sure that was the cause of her illness but it was a traumatic loss and I will now do anything to avoid it happening again. My chickens' favorite treat is pretty much any kind of...