For reasons currently unknown, epilepsy in Otterhounds in the United States does not appear to be fatal, while epilepsy found Otterhounds from the United Kingdom is frequently untreatable, and is usually fatal.
Seni teadmata põhjustel ei paista Ameerika saarmakoertel esinev epilepsia olevat surmav, samas kui Ühendkuningriigi saarmakoerte epilepsia on tihti ravimatu ja enamjaolt surmav.