Food and Feeding.
Becoming familiar with the natural history of your captive amphibian will help you determine what they can be fed. Giving your toad or frog a variety of live insects is a good practice. For the totally aquatic species; earthworms, minnows, goldfish, shrimp, and even small tadpoles, are all eaten by them. If these are not available, try small pieces of raw fish, liver, or beef. Toads and large frogs will eat mice—the size depending on the size of the toad or frog.
Feeding your animals by just dumping in a number of crickets, worms, or flies is a very poor management practice. For one thing, if you have several toads or frogs in one aquarium, the stronger, more alert animal will probably eat more than the others, and one or two will be under fed. Also, if you add live crickets to a well planted terrarium, many of the plants will be eaten by the crickets before they are eaten up themselves. It is thus strongly recommended that all your toads and frogs be fed by hand, using a thin wire or long pair of forceps. Place the cricket or worm on the end of the wire and move it in front of the amphibian. In this way you can be sure all are getting the proper amount of food, and this is also a good way to feed such things as liver or pieces of raw beef.
As a general rule, all your toads and frogs will do well if fed on a regular basis of 2 to 3 times per week. It is good practice to dust the worms or insects once a week with a calcium/phosphorus powder. This will supply your specimens with the much needed minerals.