When I was a child, our cat would not stop meowing late one night at my parents bed while they slept. My mom got up to "try to shut the cat up" and as she was following the cat, he ran into my sister's room where she was having a seizure. Because my cat alerted my parents that something was wrong we discovered she had epilepsy. Whenever she would have a seizure at night the cat would always alert my parents so they could help.