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.
The tongue is flicked forward from the mouth, and the sticky tip grasps the prey and carries it back to the mouth. Unlike most frogs, most toads do not have teeth. WHAT THEY EAT : Toads eat insects, grubs, slugs, worms, and other invertebrates like other amphibians do. As tadpoles, they eat plants. Toads, as pets, will eat fruit or vegetables. But toads in the garden, as insect eaters, should be valued for their role in pest-control!