We discovered this morning that Coco loves Bok Choy. We gave him one stalk and he immediately ate all the green, left the stalk. That stuff was $5.00 for two small bunches. I don't mind at all, spending the money, but I don't want to it to go to waste either. Can I let him eat as much as he wants? Or is that more like a treat? And, should he also eat the white part? Thanks!!