Do bull snakes eat toads

-Corn Snakes are rodent specialists in nature. (Yes, they will also raid bird nests.)

-Some other snakes specialize in eating frogs/toads.

-Snakes that eat frogs/toads have built up a resistance to the toxins produced by frogs/toads.

-Corn Snakes have no such resistance.

-It might not kill the Corn Snake to feed it a frog, but it isn't worth the risk.