Lordosis in Cats

See your vet immediately if your cat has a suddenly curved back, severe pain, weakness, trouble walking, or any loss of bladder or bowel control. Lordosis is not a diagnosis by itself. It is a descriptive term for an abnormal inward curvature of the spine, often called a swayback appearance. In cats, this curve may be present from birth, may develop as a result of vertebral malformation, or may appear secondary to muscle, nerve, or spinal cord disease.

Some cats with mild lordosis act fairly normal and are diagnosed during an exam or on X-rays taken for another reason. Others have more serious problems because the abnormal spinal shape can be linked with spinal cord compression, pain, weakness, or changes in mobility. The visible curve is only part of the picture. What matters most is whether the spine is stable, whether nerves are affected, and what underlying condition is causing the change.

In intact female cats, the word lordosis can also describe the normal mating posture seen during heat, when the hindquarters rise and the back dips. That normal reproductive behavior is very different from pathologic lordosis caused by spinal disease. If your cat has a persistent abnormal back shape, discomfort, or movement changes, your vet will need to sort out whether this is a structural spine problem, a neurologic issue, a muscle disorder, or another orthopedic condition.

Because the causes vary so much, treatment is not one-size-fits-all. Some cats need monitoring and conservative care, while others need advanced imaging, specialist input, or surgery. Early evaluation gives your vet the best chance to identify the cause and match care to your cat's symptoms, age, and quality of life.

Diagnosis starts with a careful history and hands-on exam. Your vet will ask when you first noticed the curve, whether it has changed over time, and whether your cat has pain, weakness, trouble jumping, accidents outside the litter box, or any history of trauma. A full physical exam helps your vet look for orthopedic pain, muscle changes, and other clues that could explain the posture.

A neurologic exam is especially important because lordosis can be associated with spinal cord or nerve involvement. Your vet may assess gait, paw placement, reflexes, muscle tone, and pain along the spine. This helps localize whether the problem is mainly structural, neurologic, muscular, or a combination. In some cats, bloodwork and urinalysis are also recommended to look for underlying illness before sedation, imaging, or longer-term treatment.

Spinal X-rays are often the first imaging step and may show vertebral malformations, abnormal curvature, instability, or evidence of old trauma. X-rays are useful, but they do not show the spinal cord well. If your cat has neurologic deficits, severe pain, or a complex deformity, your vet may recommend referral for advanced imaging such as CT or MRI. These tests can better define spinal cord compression, soft tissue changes, and surgical planning.

Because lordosis is a sign rather than a single disease, diagnosis may take more than one visit. Some cats need repeat neurologic exams and follow-up imaging over time, especially if signs are mild at first or the curve is congenital and your vet is monitoring progression.

Lordosis in cats can be congenital or acquired. Congenital cases are present from birth and may involve malformed vertebrae or broader spinal development disorders. In these cats, the curve may be noticed in kittenhood, though the degree of disability varies. Some kittens have a visible deformity but remain mobile, while others develop weakness, incontinence, or progressive neurologic problems if the spinal cord is affected.

Acquired lordosis can happen when another disease changes the way the spine is supported or aligned. Trauma is one important cause, especially after falls, vehicle injury, or other blunt force events. Muscle disease can also contribute. Merck notes that muscular dystrophies in dogs and cats can include kyphosis that progresses to lordosis, along with gait changes and muscle abnormalities. Neurologic disease, chronic weakness, and some orthopedic conditions may also alter posture and make the back appear abnormally curved.

Risk factors depend on the underlying condition rather than the curve itself. Young cats are more likely to show congenital problems. Cats with a history of trauma are at risk for spinal injury. Cats with inherited musculoskeletal or neurologic disease may also be affected. In some cases, what looks like lordosis may actually be compensation for hip, knee, or pelvic pain, which is why a full exam matters.

It is also important not to confuse pathologic lordosis with normal estrus behavior in intact female cats. During heat, queens may show a temporary lordosis posture with the hindquarters elevated. That is a normal reproductive response and does not mean the spine is malformed. A persistent curve, pain, weakness, or mobility change is different and should be evaluated by your vet.

Not every case of lordosis can be prevented. Congenital spinal malformations develop before birth, so pet parents cannot prevent those after a kitten is born. If a cat has a confirmed hereditary spinal defect, breeding is generally discouraged. PetMD notes that cats diagnosed with congenital spinal and vertebral malformations should not be bred, and their parents may also need breeding reconsidered.

For acquired cases, prevention focuses on reducing spinal injury and supporting overall musculoskeletal health. Keeping cats indoors or in safe enclosed outdoor spaces lowers the risk of vehicle trauma and falls. Secure window screens are important because high-rise falls can cause serious orthopedic and spinal injuries. Good body condition also matters. Extra weight can worsen mobility problems and make it harder for a cat with a spinal issue to move comfortably.

Home setup can help protect vulnerable cats. Use low-entry litter boxes, ramps or steps to favorite resting spots, and non-slip flooring where possible. These changes do not prevent congenital lordosis, but they can reduce strain and lower the chance of secondary injury. Regular veterinary exams are also useful because subtle gait changes, muscle loss, or posture changes may be noticed before a cat is obviously struggling.

If your cat already has a spinal curve, prevention shifts toward preventing progression and complications. Follow your vet's activity recommendations, keep follow-up visits, and report any new weakness, pain, constipation, or urinary changes early.

The outlook depends on the cause, the severity of the curve, and whether the spinal cord is involved. Cats with mild congenital lordosis and no neurologic deficits may do quite well with monitoring and home adjustments. In those cases, the visible curve can remain stable for long periods. Cats with pain or mild mobility issues may improve with activity modification, supportive care, and treatment directed by your vet.

The prognosis becomes more guarded when there is spinal cord compression, progressive weakness, incontinence, or severe underlying muscle disease. PetMD notes that some spinal malformations do not respond well to surgery if compression is diffuse or long-standing. In trauma-related cases, outcome often depends on how quickly the cat is treated and whether deep pain sensation and motor function are preserved.

Recovery can be slow. Cats treated medically may need weeks of restricted activity and repeat exams. Cats that undergo surgery may need hospitalization, careful home confinement, and rehabilitation. Some improve significantly, while others are left with chronic mobility or elimination issues that need long-term management.

Your vet can give the most accurate outlook after identifying the underlying problem. In general, earlier evaluation improves decision-making. It helps your vet determine whether conservative care is reasonable, whether the condition is progressing, and whether referral could improve comfort or function.