Narcolepsy was my first thought too, except for the seizures. That
sounds more like neurologic lesions or something. I read through a lot
of the online veterinary journals, mostly at HayNet, last night. The
major nervous system diseases (EPM, etc.) all seem to come with such
symptoms as fever and diarrhea except for HYPP, which is a genetic
QH-based disease. I could have sworn I read about a similar incidence
in the EQUUS case files, but haven't found it yet. We'll keep looking!
~Nikki~