I am reliably informed by Nicholodeon (of the aptly named DOGma reVIEW) that today is the name-day of St. Sithney, patron saint of mad dogs, and this is confirmed by the 13th century martyrology of Exteter Cathedral. According to Nicholas Orme (no relation to Nicholodeon, I think) in The Saints of Cornwall, God offered to make St. Sithney the patron of young girls. Sithney, alarmed that he would get no respite from the young lasses pestering him for finery and husbands, wisely backed off, choosing a less dangerous tutelage, that of mad dogs!
Mad and sick dogs were taken to drink from St. Sithney's spring near Helston, in Cronwall, to cure them.
Here is a photo of my very own mad dog, Grendel the Misanthropic Dog.