Katherine M Cohen & Lucas R. Diaz 
Dogs [PDF ebook] 
Domestication History, Genetics, Behavior and Implications for Health

In this book the authors discuss the domestication history, behavior and common health problems of dogs. Topics include the epidemiological trends and neuropathological manifestations of canine distemper virus; behavior and welfare of dogs; marketing and the domestication of dogs; responsible ownership and behaviors; advances in the canine coproparasitological examination; and an examination of ovariohysterectomy (spaying) and healthy longevity in dogs.