Hello, Robin. Cranwell's Horned Frogs are easy to take care of. A lot of people feed an abundance of rodents to their Cranwell's, they are best left as a treat offered about once a month or once every other month. A good staple diet would be made of earthworms and other insects. My Cranwell's named Zilla has only accepted 1 pinkie mouse, and now ignores them entirely. Zilla never and I repeat never passes up a earthworm or cockroach.
The only downfall of a Cranwell's is that they don't move around much, but they do look nice in a terrarium. Mine was a very vibrant green when purchased, but is now mostly brown and a yellowish color. If I was looking for a colorful horned frog though, I would have purchased an Ornate.
Sorry, it looks like I've rambled on a bit. It's nice to meet you Robin, and if you have any questions on your Cranwell's, there a lot of knowledgeable people on here. Good luck!