This is very interesting to me. Pothos is on the list of safe plants for reptiles yet not on the "edible" list. I have kept pothos in various reptile enclosures over the years with no ill effects. And tortoises have picked at them. It does say causes irritation if eaten in large quantities. I'm guessing since frogs are more sensitive it is probably highly toxic for them.
Thanks for the heads up!
Carole