Here's a great quote from an article written for Reptiles Magazine which goes right along with my approach to feeding the Anaxyrus americanus Toads I kept as a pre-teen and the Hyla versicolor Tree Frogs I have now:

"Toads should not be fussy eaters. Healthy toads are usually actually quite pudgy! If you are housing them correctly within the suggested temperature range, then they will accept crickets, mealworms, waxworms, earthworms or superworms of appropriate size. They usually consume anything that they can fit in their mouth. Gut-loaded crickets can make up the majority of the diet; however, variety is the spice of life, and the more you can vary a toad’s diet, the better off it will be. During warm months, catching local insects (nontoxic, of course) can provide added variety. Moths seem to be particularly relished by most toads. In the wild, they eat grubs, spiders, worms, insects, slugs, snails and other invertebrates. If your toads are wild-caught, try offering them what they eat in the wild."

In captivity Toads won't produce the toxic secretions they do in the wild unless you feed them the venomous arthropods they relish in the wild. My resident wild Anaxyrus americanus Toads can be seen nearly every night of the Spring, Summer, and Fall hunting spiders along the pool coping and over the entire large concrete patio area of my compound. I've sat and watched them snap up spiders for a couple of hours at a time on warm Summer nights.