👉 Hassock, also known as a hatless dog, is a breed of dog that has been bred to be completely blind. They are typically short-haired and have long hair on their backs and legs. The breed was first recognized in 1920 by the English veterinarian John H. Hasson, who used the term "Hassock" to refer to the breed. The Hassock is a cross between a dog with a normal hearing and a blind dog. They are known for