Adolescence is the awkward teenage period between childhood and the adult years (13 to 19 years of age).    Adolescence is the development of young kids. The stage starts  around puberty and last until adulthood.
Chow Chow. Besides being one of the breeds that shed a lot, the chow is also one of the most expensive. They are one of the oldest dog breeds and ancestors to many of the modern dogs. Unfortunately the breed is prone to several diseases like cataracts, glaucoma, entropion, diabetes, pemphigus, and hip dysplasia.
Next on the list of most dangerous dog breeds is the Rottweiler. This is based on studies conducted by the American Veterinary Medical Association, the Humane Society, as well as the Center for Disease Control.