The Irish Wolfhound is considered the world’s tallest dog. It can reach up to 180 pounds and stands up to 32 inches tall at the shoulder, Irish Wolfhound is originated in Ireland and was used for the purpose of wolf hunting.

Chow Chow is originally from China, the Chow Chow’s name in Chinese is Songshi Quan and means “puffy-lion dog.” Chow is one of the oldest breeds of dogs, Chow Chows are known for their bluish-black tongues and gums. At birth, a Chow Chow’s tongue and gums are pink, but after a few weeks they take on the bluish-black color.

Contrary to common belief dogs are’t colorblind in the sense that they see more than just black, white, and gray. However, the color range they perceive is limited compared to the spectrum humans see. They can see shades of yellow, blue, green and gray. The red color registers on a gray scale in a dog’s vision.