The first spaniel in America came across with the Mayflower in 1620, but it was not until 1878 that the first Cocker Spaniel was registered with the American Kennel Club (AKC). They are capable of jumping in excess of 7 feet (2.1 m) vertical due to the dense muscle build of the breed. These dogs remained in the Brooke family for nearly 300 years. Young American Bulldogs may be slightly aloof with strangers, but as they mature the breed's normal confidence should assert itself. In 2013, the cocker spaniel ranked 29th the American Kennel Club registration statistics of historical comparisons and notable trends.
The American Hairless Terrier does not have dental issues (absent premolars) or other characteristics associated with the dominant hairless gene. Most show hounds are Walkers, many of the pack hounds (used with hunting foxes on horseback) are Penn-Marydel and hunters use a variety of strains to suit their hunting style and quarry. It is estimated that three-quarters of the world's dog population lives in the developing world as feral, village or community dogs, with pet dogs uncommon. "The most widespread form of interspecies bonding occurs between humans and dogs" and the keeping of dogs as companions, particularly by elites, has a long history. (As a possible example, at the Natufian culture site of Ain Mallaha in Israel, dated to 12,000 BC, the remains of an elderly human and a four-to-five-month-old puppy were found buried together). However, pet dog populations grew significantly after World War II as suburbanization increased. In the 1950s and 1960s, dogs were kept outside more often than they tend to be today (using the expression "in the doghouse" to describe exclusion from the group signifies the distance between the doghouse and the home) and were still primarily functional, acting as a guard, children's playmate, or walking companion. Obo II, was born around this time. The first has been the 'commodification' of the dog, shaping it to conform to human expectations of personality and behaviour. The second has been the broadening of the concept of the family and the home to include dogs-as-dogs within everyday routines and practices. There are a vast range of commodity forms available to transform a pet dog into an ideal companion. The list of goods, services and places available is enormous: from dog perfumes, couture, furniture and housing, to dog groomers, therapists, trainers and caretakers, dog cafes, spas, parks and beaches, and dog hotels, airlines and cemeteries. While dog training as an organized activity can be traced back to the 18th century, in the last decades of the 20th century it became a high profile issue as many normal dog behaviors such as barking, jumping up, digging, rolling in dung, fighting, and urine marking[further explanation needed] became increasingly incompatible with the new role of a pet dog. Dog training books, classes and television programs proliferated as the process of commodifying the pet dog continued. An Australian Cattle Dog in reindeer antlers sits on Santa's lap A pet dog taking part in Christmas traditions The majority of contemporary people with dogs describe their pet as part of the family, although some ambivalence about the relationship is evident in the popular reconceptualization of the dog–human family as a pack. A dominance model of dog–human relationships has been promoted by some dog trainers, such as on the television program Dog Whisperer.