I realize the point is moot now, but my own Google search for pain causing a fever led me to multiple answers of NO, and I know from my own medical issues that it is untrue, fever can be a rather rare response of the body to pain.
Harvester ants are the staple food source for most types of Horned Lizards or (horn toads). They provide formic acid - a necessary nutrient for horned lizards. A typical horned lizard adult may eat from 20 - 100 harvester ants a day. However, most pet stores do not supply harvester ants as feeders for horned lizards.
Diet The diet of a Cane Toad consists of insects, small snakes, frogs, lizards, and mice. They will eat virtually anything they can fit into their mouths and have been known to eat dog food from bowls and bees straight from their hive.