92 Doesn't seem high enough, but without being able to measure the temp in the enclosure (possibly slightly higher - due to body heat), there's no way to be sure. You may have fed the first three off before they could exhibit symptoms. Again, it's possible it was due to heat exposure, but there is no way to tell for sure. Maybe someone else will come along with ideas, but those symptoms of gasping and seizures can be signs of heat stroke.