Breed-related disease: Chow Chow

The Chow Chow, among the world’s most singular and possibly oldest breeds, is depicted in artifacts of China’s Han Dynasty (c. 206 b.c.), but evidence suggests Chows go back much further and are progenitors of other spitz-type breeds—from the burly Norwegian Elkhound to the dainty Pomeranian. Chows have played many roles during their long history.…