Anatomy
The Golden Retriever is a large, strongly built breed with a dense, water-repellant wavy coat.[9] As a dog with origins in pedigree breeding, and due to its widespread historical popularity, some regional variations have emerged in the breed; therefore, the three subtypes of the Golden Retriever reflect the typical variations in dimensions and coat. However, all Golden Retrievers are blonde, yellow, or gold in colour and all subtypes are susceptible to the same health problems.[10] Golden Retrievers also are very smart dogs that are loyal and friendly to their caregivers.The Golden Retriever is a large, strongly built breed with a dense, water-repellant wavy coat.[9] As a dog with origins in pedigree breeding, and due to its widespread historical popularity, some regional variations have emerged in the breed; therefore, the three subtypes of the Golden Retriever reflect the typical variations in dimensions and coat. However, all Golden Retrievers are blonde, yellow, or gold in colour and all subtypes are susceptible to the same health problems.[10] Golden Retrievers also are very smart dogs that are loyal and friendly to their caregivers.
British-type Golden Retrievers
are prevalent throughout Europe and Australia. The skull is broader and forequarters more muscular than other types the muzzle is balanced and well chiseled. The coat is generally lighter in color than the American types. Males stand between 22 to 24 in (56 to 61 cm) at the withers; females are between 20 to 22 in (51 to 56 cm). Acceptable or expected weights are not specified in the UK standard, but the Kennel Club standard calls for a level topline and straight hindquarters without the slight rear angulation found in American lines.
The eyes are round and dark, which is in contrast to the triangular or slanted composition of their American counterparts. British Golden Retrievers can have a coat colour of any shade of gold or cream; red or mahogany are not permitted. Originally, cream was an unacceptable colour in the UK standard, but the standard was revised in 1936 to include cream. At the time of this revision, the exclusion of cream as a colour was agreed to as a mistake, as the original "yellow" retrievers of the 19th century were actually lighter in colour than was permitted by the standards used before 1936. As with American lines, white is an unacceptable colour in the show ring. The British Kennel Club standard is used in all countries except the USA and Canada. Golden Retrievers have muscular bodies with great endurance, owing to their origins as hunting and gundogs.
American types
are lankier and less muscular than other types, males stand between 23 and 24 in (58 and 61 cm) in height at the withers; females are 21.5 to 22.5 in (55 to 57 cm) tall. Their coats are darker in color, and occur in various shades of lustrous gold with moderate feathering. When trotting, they have a free, smooth, powerful, and well-coordinated gait; as the dog runs, its feet converge towards the center of the line of balance.[15] The American standard also makes requirements about the proportion, substance, head and skull, neck, body, topline, forequarters, and hindquarters; in these respects, the American-type Retriever is the same as Golden Retrievers that conform to other national standards. American breeders of Golden Retrievers sometimes import their dogs from Britain to take advantage of the temperament and appearance of the British types.
The normal breathing process
As a dog inhales, fresh air moves through the nose (or mouth), pharynx, and larynx to the trachea. The trachea carries the air to the bronchi, which in turn supply the lungs. Air exchange occurs in the alveoli and the used air follows the opposite path of new air: passing into the bronchi, into the trachea, through the larynx and pharynx, finally exiting through the nose or mouth.
Breathing is relatively simple and is accomplished by the actions of the rib muscles (intercostals) and the movement of a great internal muscle called the diaphragm. The diaphragm muscle separates the chest, containing the heart and lungs, from the abdomen which holds the intestines, stomach, liver, bladder, etc. As this great muscle moves toward the abdomen, it creates a negative pressure and pulls fresh air and oxygen into the lungs, causing the dog to breathe in (inhale). The chest cavity surrounding the lungs is a vacuum, thus allowing the lungs to inflate easily when the dog inhales. When the muscle moves forward (towards the animal's head), it causes the lungs to compress and force air out (exhale), thus ridding the body of used air.
Health and lifespan
The average lifespan for a Golden Retriever is about 11 to 12 years.[22][23][24] They are susceptible to specific ailments, so should be taken to a veterinarian for yearly checkups.
Golden Retrievers are known to have genetic disorders and other diseases. Hip dysplasia is common in the breed; when buying a puppy, the pedigree should be known and be examined by the OFA or by PennHIP for hip disease. Obesity is also common in the breed because Golden Retrievers love to eat. Puppies should eat about three cups of food a day and adults three to five cups, depending on the food and how active the dog is.[17]