However, a hunched back alone does not establish structural kyphosis. A cat may also hunch because of pain, even without a permanent abnormality in the shape of the vertebrae. A new change in back posture and a vertebral abnormality documented on images for a long time therefore provide different starting points for investigation.
When to see a vet urgently
Seek urgent assessment if a change in back posture is accompanied by any of the following:
- Your cat cannot walk, or hind leg weakness progresses rapidly.
- Back pain is severe or began after a fall, bite or road traffic accident.
- Your cat has increasing difficulty moving and also develops changes in urination or bowel control.
- The ability to use the limbs suddenly deteriorates or your cat drags them.
If necessary, find a vet near you. Do not try to straighten the back or test pain sensation at home.
Overview
A kyphotic spine forms a rounded “hump” or pronounced arch. In some cats this does not affect quality of life, but a severe deformity can compress the spinal cord and nerve roots, causing pain, limb weakness and walking difficulties.
The size of the visible curve alone does not determine the cause of symptoms. Your vet investigates whether there is associated spinal cord or nerve root damage and whether the location of the symptoms matches the change seen on imaging. Back posture can also change during another painful illness, so examination is not limited to the outward shape of the vertebrae.
The spinal column and spinal cord are different structures. The vertebrae form a bony canal that protects the spinal cord. Nerve pathways within the spinal cord carry signals involved in limb movement and sensation, among other functions. A misshapen vertebra may be particularly significant if it is accompanied by narrowing or other changes affecting nervous tissue.
Causes
The main causes of kyphosis in cats include:
- Congenital vertebral abnormalities, such as wedge-shaped or fused vertebrae.
- Spinal injuries, including fractures and bruising.
- Degenerative diseases of the spine and intervertebral discs.
- Tumours of bone or the spinal cord.
- Infections, such as spondylitis and osteomyelitis.
- Age-related changes in bone tissue.
Not every disease listed causes the same kind of permanent bony curvature. A disc problem, for example, may cause pain, reluctance to move and altered back posture, and in more severe cases spinal cord compression. Age-related bony growth around the margins may, on the other hand, be found on imaging without significant symptoms. Imaging findings and your cat's clinical condition are assessed together.
Risk factors
Kyphosis develops more often:
- In cats with congenital skeletal defects, such as short tails in Manx and bobtail cats.
- In older animals.
- After a spinal injury.
- In cats with tumours or bone infections.
There is limited research on risk factors for true kyphosis in cats. Congenital abnormalities of the sacral and tail regions have been described in Manx cats, but these are not the same as the thoracic or lumbar changes responsible for every curved back. A short tail alone does not establish kyphosis or spinal cord damage. Older age alone does not identify the cause of back symptoms either.
Main symptoms
Symptoms depend on the degree of curvature:
- A visible curved deformity of the spine.
- Reduced mobility.
- Lameness or an unsteady gait.
- Pain during movement and when the area is felt.
- Hind leg weakness.
- In severe cases, impaired bladder and bowel control due to spinal cord compression.
Pain may be subtler than lameness. Your cat may avoid jumping, hide more than usual, react irritably to touch or groom less. Hunching may be accompanied by squinting and reduced appetite. A cat that is purring can still be in pain.
Assessment of neurological weakness also considers paw placement, coordination of steps and which limbs are affected. Slow movement alone does not distinguish pain, muscle weakness and actual spinal cord damage. Your description of how the change began and whether it is progressing is useful during the examination.
Complications and consequences
Severe kyphosis can lead to:
- Chronic pain.
- Progressive lameness.
- Hind leg paralysis.
- Neurological disorders.
- Reduced quality of life.
The risk of progression depends on the cause of the curvature and the condition of the nervous tissue. Spinal cord damage after an accident can worsen after the initial phase because of swelling and bleeding too. Do not encourage a cat with sudden symptoms to move around to see whether it loosens up. If an injury is suspected, ask the clinic for instructions on moving your cat safely.
Diagnosis at the vet
Diagnosis uses:
- Clinical examination and neurological tests.
- Spinal X-rays as a basic imaging method.
- MRI or CT to assess spinal cord compression and the nature of the lesion.
- Blood tests and biochemistry if infection or a tumour is suspected.
A neurological examination helps locate whether the problem involves the spinal cord, nerve roots or other structures. Your vet assesses walking, postural reactions, muscle tone, reflexes and sensation in a safe sequence. If an unstable spinal injury is suspected, not all tests requiring movement are carried out before the situation has been clarified.
For hind limb symptoms, the perineal reflex and associated tail movement may also be examined, as these findings help locate nervous system damage.
Withdrawing a limb from a stimulus can be a spinal reflex. It is not the same as an animal consciously perceiving pain. Pinching toes at home therefore does not provide a reliable prognosis and can cause unnecessary pain. Your vet assesses sensation as part of the overall examination.
X-rays show the structure of the vertebrae and their alignment. CT, or computed tomography, produces cross-sectional images and can help assess bony structures or injuries in greater detail. MRI provides detailed information about soft tissues such as the spinal cord. These investigations complement one another, and the choice depends on the question that needs answering.
Imaging usually requires sufficient stillness. Depending on the situation, CT can be performed under sedation or anaesthesia, while MRI usually requires general anaesthesia. Your vet assesses safety and the benefit of the investigation according to your cat's condition. Blood tests can contribute information about general health or inflammation, for example, but do not establish spinal cord compression on their own.
Choosing treatment
Treatment targets the cause of symptoms and your cat's ability to function. A structural abnormality causing no symptoms and progressive spinal cord compression require different plans. Milder spinal conditions may be managed with pain relief prescribed by your vet and individual activity restrictions. An infection or tumour needs treatment directed at its own cause.
Surgery may be considered if there is significant pressure on nervous tissue. In a single case report involving a Manx kitten, a thoracic vertebral malformation caused progressive hind limb weakness and impaired coordination. Decompressive surgery after X-rays and CT improved the symptoms. Such a case shows that treatment is possible in some situations, but does not establish the prognosis or suitable surgical approach for every cat.
Do not start stretching the back, vigorous massage or other mechanical manipulation before diagnosis. Any rehabilitation and increase in activity are planned according to the findings. Pain improving does not, by itself, mean that the danger associated with an unstable or compressive lesion has passed.
Support and monitoring at home
Once your vet has assessed movement at home as safe, reducing unnecessary climbing can make daily life easier. Food, water and an easily accessible soft bed can be placed at floor level for a cat with mobility difficulties. A litter tray with low sides may make access easier. If your cat has been prescribed rest, do not alter routes around the home to increase activity without the clinic's guidance.
Record whether your cat can walk, eat, groom and use the litter tray. Distinguish difficulty getting into the tray from an inability to control urination or defaecation normally. A new change in continence or increasing limb weakness is a reason to contact your vet. Follow-up visits assess neurological findings and the effects of treatment on function as well as pain.
Prevention
Kyphosis cannot be prevented completely, but the risk can be reduced through:
- Careful breeding selection, excluding cats with congenital deformities.
- Injury prevention, with a safe environment indoors and outdoors.
- Prompt treatment of infections and bone inflammation.
- Weight management to reduce strain on the spine.
Weight management and a safe environment can support mobility, but do not correct an existing vertebral malformation. If a congenital abnormality is suspected, assessment of breeding suitability is also based on the identified change and its possible inheritance, rather than simply the appearance of the back or tail.
Important for cat owners
Kyphosis can be a harmless postural abnormality or a serious condition. If you notice an arched back, lameness or pain during movement, your cat needs a veterinary orthopaedic or neurological examination. Early recognition and supportive measures help preserve activity and quality of life.
This material is for information and does not replace treatment advice. Contact a vet as soon as the first symptoms appear.
Frequently asked questions
Does every cat with a hunched back have kyphosis?
No. A hunched posture can indicate pain without a permanent change in vertebral shape. Have a new postural change examined, particularly if movement or appetite also changes.
Does a short tail mean a cat has spinal cord disease?
Not on its own. Manx cats, for example, are associated with certain developmental abnormalities, but their presence and significance are assessed individually. Tail length does not replace neurological examination or imaging.
Does kyphosis always need surgery?
No. Treatment needs depend on the cause, pain and any compression of nervous tissue. Progressive neurological symptoms may require surgical assessment, whereas a finding causing no symptoms may be managed differently.
Can I try to straighten my cat's back with massage?
Not before veterinary assessment. Manipulating a structural abnormality or injury can be harmful, and a pain-related posture cannot safely be treated on the assumption that it is merely muscle tension. Rehabilitation is planned according to the diagnosis.
This article is for general information only and is not a guide to treatment. If you notice the first signs of illness, contact your vet.
Paw4care editorial team
Sources
- Disorders of the Spinal Column and Cord in Cats, Merck Veterinary Manual, accessed 2026-11-03.
- Congenital and Inherited Spinal Cord Disorders in Dogs and Cats, Merck Veterinary Manual, accessed 2026-11-03.
- Signs Of Pain, Cats Protection, accessed 2026-11-03.
- The Neurologic Examination of Animals, Merck Veterinary Manual, accessed 2026-11-03.
- Imaging Service, Cornell University College of Veterinary Medicine, accessed 2026-11-03.
- Surgical management of vertebral malformation in a Manx cat, Journal of Feline Medicine and Surgery / PubMed, accessed 2026-11-03.
- Arthritis in Cats: Signs, Treatment & Care, Cats Protection, accessed 2026-11-03.