Joint health risks specific to large/giant breeds
Large breed dogs have an extra heavy load to carry around, which puts additional pressure on their joints throughout their lives. This constant pressure can create friction within the joints, leading to inflammation, pain, and stiffness over time; especially if preventative measures aren’t utilised.
Aside from this extra load, the joints of large breed dogs are also more susceptible to trauma. This is because their growth plates, or areas of bone around their joints, take longer to close, than other breeds. Whilst small/medium dogs’ growth plates will fully develop and close around 12 months of age, this doesn’t happen for larger breeds until around 18 months, leaving them more vulnerable to injury in these areas [1].
Large dogs are also large as puppies and, like all puppies, they grow and develop at a rapid rate during their first year of life. However, they may not “grow into their bodies” as fast as they develop physically, which leads to accidents and clumsiness, further exacerbating their vulnerability. Injuries and trauma that occur before the growth plates are closed can take longer to heal, and potentially leave joints malformed or out of place permanently.
A note about neutering
Delaying neutering or spaying until after the age of 2 years is strongly recommended for large or giant breeds due to the crucial role of growth plate development. Performing these procedures too early can heighten the likelihood of joint complications later in life, as it disrupts the hormonal surge necessary for growth plate closure.
During puberty, dogs experience an increase in estrogen/progesterone and testosterone levels, which prompts the closure of growth plates in their long bones, halting further growth.
Dogs that are neutered before reaching puberty miss out on this hormonal surge, leading to prolonged growth of their long bones and ultimately resulting in greater height when growth eventually halts compared to their unneutered counterparts. A study conducted in 2020 by the University of California found that early neutering could triple the risk of joint disease. [2]
Common mobility issues in large breed dogs
Hip dysplasia
Hip dysplasia in dogs is more common in large/giant breeds, but can occur in medium-sized breeds as well. This condition is often genetic, with certain breeds being more vulnerable than others. It’s essentially a result of the ball and socket of the hip joint not fitting together properly, causing them to grind and rub against each other instead of the smooth, gliding motion they’re supposed to create.
For example, “bunny hopping” when moving is a visual tell tale sign. Over time, this creates a degenerative effect, and can even lead to complete loss of hip function, with hip replacements being the only option.
Arthritis
Arthritis in dogs causes joint pain, stiffness, and decreased mobility. It’s a common condition in both ageing dogs and large breeds, and can be detrimental to a dog’s quality of life. In its basic form, arthritis is inflammation of the joints; though there are several types of dog arthritis, with each being characterised slightly differently.
Osteoarthritis is the most common form of arthritis in dogs. This involves progressive degeneration of the joints and is most commonly found in older dogs, though large breeds carry a higher risk than other breeds might [3].
To discover more about arthritis in dogs check out our video, Canine Arthritis and Inflammation recorded by Dr Nick Thompson consultant vet to ProDog.
Luxating patella
Luxating patella is a condition in which a small bone in the knee (the patella) dislocates and moves freely within the knee cap. Though genetically speaking this most often occurs in smaller breeds, over the last decade there have been more incidences of luxating patella in large breeds as well.
Luxating patella in dogs can also happen as a result of trauma, which is more common in large breeds; especially during their puppy/young adult years when the growth plates aren’t fully closed. Dog patella luxation can be a secondary condition to other joint abnormalities, such as hip dysplasia and malformation of other bones/joints [4].
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