I have hylotelephium, and have fed it to my tort on several occasions after seeing it as a safe feed in the TTT. Will you please let us know the reason you wouldn't feed it?Kalanchoe fedtschenkoi
Cowboy Ken's is a Hylotelephium - not closely related.
I would not feed either.
Interesting, I'm constantly battling grasshoppers and slugs on mine. I wonder if some varieties have different tastes that make them unappealing.I have no references that describe toxicity from Hylotelephium, but I have observed that very few animals or insects eat these plants. If our gophers don't eat something, that makes me suspicious.