Dog Kung Fu, i.e. Góuquán, i.e Dishuquan, is a southern style of Chinese boxing that
specialises in takedowns and ground fighting. This martial art also teaches Iron Shirt and Iron Palm fighting methods as well as specialized leaping techniques. It is mainly practiced in Fujian Province and was historically often practiced by women who were victims of foot binding, for whom any form of standing physical exertion was difficult. Its creation is traditionally credited to a Buddhist nun who developed the style to defend herself from bandits on her travels.
http://en.wikipedia.org/wiki/Dog_Kung_Fu
This book-
from Amazon, is an old text, but reveals a style that has been quite secret for many years. There are some more Dog Style books at plump.com. This style would be very useful if you ever found yourself on the ground.