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Bones and joints

Chondrodysplasia (disproportionate dwarfism)

Chondrodysplasia is an inherited disorder of cartilage and bone growth that leaves the legs shorter than the size of the body would suggest. Beyond the length of the legs, the disorder can also affect the joints and the spine. Bones that grow out of shape can make movement harder or cause pain over time.

Updated

2 breeds

What it is

Long bones grow from soft plates of cartilage near their ends, which slowly turn into bone as a puppy grows. In chondrodysplasia an inherited change disturbs this process, so the leg bones stop lengthening early and can grow thick, short or bent.

For some dogs, short legs are simply part of how they are built, and they move comfortably. For others, the uneven growth strains the elbows, wrists and spine, and the discs of the back can age early, which makes back trouble more likely.

Day to day, the aim is to protect those joints and that back: keep your dog lean, use a ramp or steps instead of jumps on and off furniture or out of the car, and choose steady walks over leaping games. Non-slip rugs on smooth floors help too.

Signs you may notice

You may notice a puppy with short, bowed legs or paws that turn outwards, and a body that looks out of proportion. An older dog may find it harder to move, limp or avoid jumping.

When to see a vet

Book a visit if your dog starts limping, seems stiff, cries when moving or being picked up, or avoids jumps and stairs it used to manage. If the back legs suddenly weaken or drag, see a vet immediately.

This is general information, not veterinary advice. For your own dog's health, tests and treatment, see a vet.

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