From my understanding all types of kale are fine.Can he have any kind of kale or can he have only certain types?
We are growing dinosaur kale, collard greens and regular kale in the "leafy" section of our garden.
Kales are fine in moderation as part of a varied diet. They are high in goitrogens, which could cause thyroid problems like most brassicas, so shouldn't be fed to excess.