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.
Your ants will need water though, and a few drops on a pea-sized piece of sponge is the easiest way to supply it. You could also try a solution of honey or syrup in water, but donât make it too sticky or unwary ants could become trapped. With both food and water, itâs important not to supply too much. Decaying food is the last thing you want in a closed environment like an ant farm. Having said that, ants are remarkably clean animals and they will keep their tunnels and chambers clean by removing waste to a disposal area.