What is the second heaviest dog breed?
I think it is the Great Dane. I'm not 100% sure, though. Don't rely on this.
Either the Great Dane or the Irish Wolfhound
he Chihuahua is officially the smallest breed of Dog, and the current living World's Smallest Dog is also a Chihuahua. The largest breed of Dog (by height) is the Irish Wolfhound, even larger than the Great Dane. However, the current World's living Tallest Dog is a Great Dane. The heaviest breeds of Dog are the St. Bernard and Mastiff (sometimes called the Old English Mastiff). Neapolitan Mastiffs are also contenders for the heaviest breed of…
The tallest breed of dog is the German Great Dane. However, the heaviest breed is the Swiss St. Bernard. The smallest dog ever is the Chihuahua from Mexico. It is also the lightest breed of dog. The smallest dog breed on average is the chihuahua at 5-7 inches tall. The largest dog breed on average is the Irish Wolfhound at 34-36 inches tall.