Your kitten has an odd hopping walk, or your cat's back has a noticeable dip you can't remember seeing before. Before you panic, it helps to understand what's actually going on inside the spine and what kind of life is genuinely possible from here.

Spina bifida and lordosis are two different but related spinal conditions seen in cats. Spina bifida is a birth defect where the bony arches of the spine don't close properly during development in the womb, most commonly seen in Manx cats. Lordosis is a descriptive term for an abnormal inward curve of the spine, sometimes called a swayback, which can be present from birth, linked to a spinal malformation like spina bifida, or develop later from trauma or muscle disease. Both can range from a mild finding with no real impact on daily life to a serious condition involving weakness, incontinence, or pain. Diagnosis relies on a physical and neurologic exam plus spinal imaging, and the quality of life many affected cats can have depends heavily on the severity and how early the condition is identified.

Key Takeaways

• Spina bifida is a congenital birth defect where the spine doesn't close properly during development, most often seen in tailless Manx cats.
• Lordosis is not a diagnosis on its own. It's a descriptive term for an inward spinal curve that can be congenital, linked to spina bifida, or develop later from trauma, muscle disease, or nerve disease.
• Mild cases of both conditions can go unnoticed for years and may only be found incidentally during an exam or X-rays for something unrelated.
• More severe cases can affect bladder and bowel control, hind leg strength, and walking pattern, sometimes producing a distinctive hopping gait.
• See your vet immediately if your cat has sudden back pain, paralysis, trouble standing, or loses bladder or bowel control.
• Many cats with mild to moderate spinal deformities go on to live full, comfortable lives with monitoring and home adjustments, even without a cure for the underlying structural issue.

Spina bifida is a congenital defect in which the bony arches of the vertebrae fail to close completely around the spinal cord during a kitten's development in the womb. The result is a gap or cleft in the spine, which can range from a barely-there finding with no real consequence to a more serious defect involving the spinal cord or its surrounding membranes. Lordosis, by contrast, is not a diagnosis in itself. It's a descriptive term vets use for an abnormal inward curvature of the spine, often called a swayback appearance, and it can show up as one possible sign of spina bifida, a different spinal malformation entirely, or a problem unrelated to congenital spine defects altogether.

These two conditions are closely connected in feline medicine because spina bifida is one of the more common causes of a visibly curved or malformed spine in cats, and because both are seen with notable frequency in Manx cats, the naturally tailless breed whose genetics for taillessness are tied to how their spine and tailbone develop. That said, neither condition is exclusive to Manx cats, and lordosis in particular can develop in any breed as a result of trauma, muscle disease, or compensating for pain elsewhere in the body.

Some cats with mild spina bifida or lordosis show essentially no outward signs and are only diagnosed incidentally, during a routine exam or X-rays taken for a completely unrelated reason. Others have a much more visible and life-altering version of the condition, with difficulty walking, a distinctive hopping gait, or loss of bladder and bowel control. What actually determines a cat's quality of life isn't the visible curve or gap itself, it's whether the spinal cord and the nerves running through it are affected, and how severely.

The genuinely encouraging part is that many cats with mild to moderate spinal deformities live full, comfortable lives with the right monitoring and home support, even though there's no cure for the underlying structural defect itself. Your vet's role is to figure out exactly how much the nervous system is involved, since that single piece of information shapes both the realistic prognosis and the day-to-day management plan.

Signs and Symptoms

The most visible sign of these conditions is an abnormal curve or shape to the spine, but the severity of outward signs varies enormously from cat to cat. A kitten with spina bifida is often first noticed when they begin to walk, sometimes showing a distinctive hopping, rabbit-like gait rather than a typical feline stride, because the hind legs aren't receiving fully normal nerve signals.

For lordosis specifically, the most obvious sign is a visible dip or inward curve along the back, though the appearance can range from genuinely subtle to quite dramatic. Some cats hold themselves differently because of pain or weakness, while others compensate for an entirely different problem in the hips, knees, or muscles, which can make the spine look more abnormal than it actually is.

Other signs to watch for in either condition include:

• A visible malformation, dimple, or unusual swelling along the spine, sometimes felt rather than clearly seen
• Hind leg weakness or a stumbling, uncoordinated gait
• A hopping or rabbit-like way of moving, particularly in kittens
• Plantigrade stance, where more of the hind leg touches the ground than is normal for a cat
• Reduced or absent sensation around the perineum, the area around the tail base and rear end
• Urinary or fecal incontinence, or straining without producing urine or stool
• Reluctance to jump, climb stairs, or engage in normal play
• Pain or sensitivity when the back is touched, though many affected cats show little outward pain even when the spine looks visibly abnormal

Behaviour changes matter just as much as the physical signs. A cat with a spinal problem may groom less, sleep more, hide more often, or seem irritable when picked up around the back end, even before a limp or visible curve becomes obvious. Because cats mask pain so effectively, subtle shifts in routine and mood are often the first real clue something has changed.

See your vet immediately if your cat has a suddenly curved back, severe pain, weakness, trouble standing or walking, or any new loss of bladder or bowel control. These signs can point to genuine spinal cord involvement and should never be watched at home rather than evaluated promptly.

How Vets Diagnose Spina Bifida and Lordosis

Diagnosis starts with a careful history and a hands-on physical and neurologic exam, since both spina bifida and lordosis are really descriptive findings that need a fuller workup to understand what's actually happening to the spinal cord and surrounding nerves. Your vet will ask when you first noticed any abnormal posture or movement, whether it's changed over time, and whether your cat has pain, weakness, trouble jumping, accidents outside the litter box, or any history of trauma.

A neurologic exam is especially important here, since these conditions can directly involve the spinal cord. Your vet will likely assess gait, paw placement, reflexes, muscle tone, and pain response along the length of the spine. This step helps localise whether the underlying issue is mainly structural, neurologic, muscular, or some combination of the three, which matters enormously for both prognosis and treatment planning.

Spinal X-rays are typically the first imaging step, and they can reveal vertebral malformations, an incomplete spinal arch consistent with spina bifida, abnormal curvature, instability, or evidence of old trauma. X-rays are genuinely useful here, but they don't show the spinal cord itself particularly well. If your cat has neurologic deficits, significant pain, or a complex deformity, your vet may recommend referral for more advanced imaging such as CT or MRI, or a specialised technique called myelography, where a contrast substance is injected around the spinal cord to make compression or defects easier to see clearly on imaging.

Because these are essentially descriptive findings rather than single, simple diagnoses, the diagnostic process can take more than one visit. Some cats need repeat neurologic exams and follow-up imaging over time, particularly kittens with a congenital defect that your vet wants to monitor as they grow, since severity and impact aren't always fully clear from a single early exam.

What Causes Spina Bifida and Lordosis in Cats?

Spina bifida is a congenital condition, meaning it's present from birth, and it's strongly associated with the genetics of taillessness in Manx cats. The same gene mutation responsible for a Manx cat's short or absent tail also affects how the lowest part of the spine develops, which is why spina bifida and related spinal malformations show up so much more often in this breed than in cats generally. The condition is inherited as an autosomal dominant trait in Manx cats, meaning a kitten only needs to inherit the gene from one parent to potentially be affected, and severity varies widely even within a single litter.

Outside of the Manx-specific genetic link, spina bifida and related vertebral malformations can also occur due to other genetic factors, nutritional issues during pregnancy, or possibly exposure to certain toxins while the kittens were developing in the womb, though in many individual cases the exact trigger is never identified with certainty.

Lordosis, by contrast, has a broader range of possible causes because it's a description of spinal shape rather than a single disease. Congenital cases are present from birth and may involve the same kind of malformed vertebrae seen with spina bifida or other spinal development disorders entirely. Acquired lordosis can develop later in life when another condition changes how the spine is supported or aligned, with trauma being one important cause, particularly after falls, vehicle injuries, or other blunt force events. Muscle disease can also contribute, since certain muscular dystrophies in cats can include posture changes that progress toward a lordosis-like curve over time. Neurologic disease and chronic weakness from other causes can also alter posture enough to make the back appear abnormally curved.

It's worth knowing that what looks like lordosis is sometimes actually compensation for an entirely different problem, such as hip, knee, or pelvic pain, which is exactly why a full exam matters rather than treating the visible curve as the whole story. It's also worth noting that intact female cats in heat can show a completely normal, temporary lordosis-like mating posture, with the hindquarters raised, which is an entirely different thing from a persistent, pathologic spinal curve and isn't a sign of spinal disease at all.

Treatment and Quality of Life

Treatment for both conditions depends heavily on severity, with the goal generally being management and comfort rather than a structural cure, since the underlying bone and spine shape typically can't be fully reversed. For cats with a mild curve, minimal symptoms, or an incidental finding with no neurologic deficits, conservative management focused on monitoring, comfort, and home adjustments is often entirely reasonable.

Conservative Management

For cats showing mild signs or none at all, the focus is on confirming stability through a physical and neurologic exam, basic spinal X-rays if needed, activity restriction during any flare-ups, weight support if a cat is carrying extra weight, and adjustments to the home setup such as litter box access, bedding, and reduced need to jump. Follow-up rechecks help your vet watch for any progression over time, particularly important in growing kittens.

Standard Management

For cats with pain, reduced mobility, mild weakness, or signs that appear to be progressing, your vet may add a more comprehensive neurologic exam, spinal radiographs, bloodwork before any sedation or medication, and a pain-control or anti-inflammatory plan if your cat is genuinely uncomfortable. Rehabilitation or physical therapy referral can be appropriate in selected cases, alongside scheduled rechecks and repeat imaging if signs change meaningfully.

Advanced Management

Severe cases involving spinal cord compression, significant trauma, worsening weakness, or loss of bladder or bowel control may call for referral to a neurologist or surgeon, advanced imaging such as CT or MRI, hospitalisation for pain control or monitoring, and in selected cases surgical stabilisation or decompression. Surgery for an opening in the skin where a spinal malformation is present can sometimes be repaired directly, and narrowing of the spinal canal can occasionally be addressed surgically as well, though outcomes depend heavily on how diffuse or long-standing the compression already is by the time surgery happens.

For cats with ongoing incontinence or constipation related to spinal nerve involvement, long-term management is often part of the plan rather than a one-time fix. This can include diet adjustments, stool softeners, an easily digestible diet, and occasional antibiotics for secondary infections related to incontinence. Mobility aids such as wheelchairs can genuinely add quality of life for cats with significant hind limb weakness or paralysis, letting them remain active and engaged despite reduced leg function.

Severity genuinely varies case by case. Cats with mild congenital lordosis and no neurologic deficits may do quite well with monitoring and home adjustments, with the visible curve remaining stable for long periods. Cats with severe nerve damage or significant loss of function carry a more guarded prognosis, and your vet can give the most honest, individualised outlook once the underlying problem is fully understood.

Prevention

Congenital spinal malformations like spina bifida develop before birth, so there's genuinely no way for a pet parent to prevent the condition once a kitten has been born with it. The only real preventive measure available is avoiding breeding cats with a confirmed hereditary spinal defect, since both spina bifida and many forms of congenital lordosis are inherited. If your cat has been diagnosed with a congenital spinal or vertebral malformation, it's strongly advised that they not be bred, and their parents may need breeding reconsidered as well, since the trait clearly runs in the line.

For acquired lordosis specifically, prevention focuses on reducing spinal injury and supporting overall musculoskeletal health throughout a cat's life. Keeping cats indoors, or in a secure enclosed outdoor space such as a catio, meaningfully lowers the risk of the vehicle trauma and falls that can cause acquired spinal injury. Secure window screens matter too, since high-rise falls can cause serious orthopedic and spinal injuries even in otherwise healthy cats. Maintaining a healthy body weight is also genuinely useful, since extra weight worsens mobility problems and makes it harder for a cat with any existing spinal issue to move comfortably.

Home setup can help protect vulnerable cats regardless of the underlying cause. Low-entry litter boxes, ramps or steps to favourite resting spots, and non-slip flooring don't prevent a congenital spinal defect from existing, but they genuinely reduce strain and lower the chance of secondary injury on top of an existing condition. Regular veterinary exams are valuable too, since subtle gait changes, muscle loss, or posture shifts may be noticed by your vet before a cat is obviously struggling at home.

Prognosis and Living Well With a Spinal Deformity

The outlook depends heavily on the cause, the severity of the curve or defect, and most importantly whether the spinal cord itself is involved. Cats with mild congenital lordosis and no neurologic deficits often do quite well with monitoring and home adjustments, and the visible curve can remain entirely stable for long periods without ever significantly affecting quality of life. Similarly, cats with mild, subclinical spina bifida that's found incidentally on an X-ray taken for an unrelated reason typically need no special treatment at all, just ongoing awareness as the cat ages.

The prognosis becomes more guarded when there's clear spinal cord compression, progressive weakness, incontinence, or significant underlying muscle disease complicating the picture. In trauma-related lordosis cases, the outcome often depends heavily on how quickly the cat was treated and whether deep pain sensation and motor function were preserved through the injury. Severe cases of spina bifida, particularly those diagnosed at birth with significant neurologic involvement, are sometimes considered untreatable, and difficult conversations about quality of life and humane options may be appropriate; this is a conversation best had directly and honestly with your vet rather than guessed at from general information.

Recovery and management can be slow regardless of the specific path chosen. Cats managed medically may need weeks of restricted activity and repeat exams to confirm stability. Cats that undergo surgery may need hospitalisation, careful home confinement, and structured rehabilitation. Some cats improve significantly with the right plan, while others are left with chronic mobility or elimination issues that genuinely need long-term, ongoing management rather than a single resolved treatment.

Your vet remains the best source for an accurate, individualised outlook once your cat's specific situation is fully understood. Earlier evaluation consistently improves decision-making, since it helps determine whether conservative care is genuinely reasonable, whether the condition is progressing, and whether referral to a specialist could meaningfully improve comfort or function for your particular cat.

FAQ

Is spina bifida common in cats?
It's relatively rare in cats overall, but it's well recognised in Manx cats specifically, where it's linked to the same genetic mutation responsible for their short or absent tails. Outside the Manx breed, spina bifida is uncommon but can occur in any cat.

Can a cat live a normal life with spina bifida?
It depends heavily on severity. Cats with mild or subclinical spina bifida, found incidentally with no symptoms, can often live completely normal lives with no special care needed beyond awareness as they age. Cats with more significant nerve involvement may need lifelong management for incontinence or mobility, but many still go on to live engaged, comfortable lives with the right support.

Is lordosis in cats always related to spina bifida?
No. Lordosis is simply a descriptive term for an inward spinal curve, and while it can be one sign of spina bifida or another congenital spinal malformation, it can also develop later in life from trauma, muscle disease, or neurologic problems entirely unrelated to a birth defect.

How do vets diagnose spina bifida and lordosis in cats?
Diagnosis usually starts with a physical and neurologic exam, followed by spinal X-rays to look for vertebral malformations or an incomplete spinal arch. In more complex or neurologically significant cases, advanced imaging such as CT, MRI, or myelography may be needed to fully understand spinal cord involvement.

Will my cat need surgery for a spinal deformity?
Not always, and many cats don't. Surgery is more likely to be considered for cases involving spinal canal narrowing, spinal cord compression, or an open skin defect connected to the malformation. Many mild to moderate cases are managed successfully without surgery through monitoring, activity adjustments, and supportive care.

Should cats with spina bifida or lordosis be bred?
No. Both conditions can be hereditary, and breeding affected cats, or in some cases even their parents, risks passing the trait to future litters. Spaying or neutering is generally recommended for cats diagnosed with a confirmed hereditary spinal defect.

References

1. SpectrumCare — Lordosis in Cats
2. Merck Veterinary Manual — Congenital and Inherited Disorders of the Nervous System in Cats
3. PetMD — Spinal and Vertebral Birth Defects in Cats