Our Cocker Spaniel, Kaycee, had seizures one morning right after her 11th birthday. Never had another one and never figured out what caused that seizure, but our trip to the emergency clinic that day brought our attention to a major heart problem that we were able to control for another year with medication. See your vet soon and let him/her be the judge. You never know and its better to be safe than sorry. Good luck and give your special dog a big "get well" wish from us.