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Hip Dysplasia, HD (Malformation of the Hip Joint) in cats

Occurrence: rarer
Location of illness: Legs

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

If the condition worsens / symptoms persist, consult a veterinarian.

Definition

Hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. (HD) in cats is a genetically determined malformation of the hip joint that leads to an inadequate fit between the femoral headThe femoral head is the ball-shaped upper part of the femur that fits into the acetabulum of the pelvis to form the hip joint. and the acetabulum.

The most important facts at a glance

Hip dysplasia (HD) in cats is a complex condition caused by genetic and environmental factors. In this condition, the head of the femur does not fit perfectly into the hip socket, leading to uneven stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. on the joint. A genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. is particularly recognizable in larger cat breeds. Environmental factors such as diet and exercise also play a role. Symptoms include reluctance to move, pain, and behavioral changes. Clinical examinations, X-rays, and occasionally CT or MRI are used for diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. to assess the condition of the joints. Blood tests can reveal inflammatory conditions and secondary arthritisArthritis is an inflammation of the joints that can cause pain, swelling, stiffness, and limited mobility. There are many forms of arthritis, including rheumatoid arthritis and osteoarthritis..

Treatment varies depending on severity and ranges from conservative measures such as pain therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. and physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. to surgical interventions. Early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment can significantly improve quality of life. Preventive measures include a balanced diet, regular exercise, and buying cats from responsible breeding. Research focuses on genetic causes, better diagnostic methods, and innovative treatment approaches such as regenerative medicine. International cooperation and technological advances support these efforts to improve the quality of life for affected cats and reduce the prevalence of the disease.

Causes

Hip dysplasia is a complex condition involving both genetic and environmental factors. The hip joint is a ball-and-socket joint consisting of the rounded head of the femurFemur is the technical term for the thigh bone. It connects the hip joint to the knee joint and plays a central role in supporting body weight and movement. that fits into the acetabulum. In cats with hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip., this head does not fit perfectly into the socket, leading to uneven stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. on the joint.

Genetic factors play a crucial role in the development of HD. Various breeds, especially larger and heavier cat breeds, show a higher prevalence. Genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. influences the development and shape of the hip joint, which can lead to dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip.. Studies show that hormonal factors during the cat’s growth phases can also play a role.

Environmental factors such as diet and exercise can influence the manifestation and progressionProgression refers to the advancement or worsening of a disease over time. It describes an increase in the severity or extent of the disease symptoms. of the disease. An unbalanced diet leading to rapid growth, as well as excessive or insufficient exercise during the developmental phase, can worsen symptoms. Overweight can further increase the load on the joints and worsen the condition.

Symptoms

Very common symptoms:

Common symptoms:

Rare symptoms:

Lameness

Cats with hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. often show subtle and gradual symptoms that can range from mild discomfort to severe mobility restrictions. The most common signs include decreased activity, difficulty jumping or climbing, and an altered gait.

In some cases, cats show a reluctance to move and become withdrawn. They might also show signs of pain, such as licking or biting in the hip area. Altered posture, lameness, or avoiding movements that put weight on the hip joint are also common signs.

In the advanced stage of the disease, muscle atrophyMuscle atrophy is the loss of muscle mass that can be caused by inactivity, malnutrition, or certain diseases. In dogs and cats, muscle atrophy can occur due to chronic diseases, aging, or after prolonged immobilization. in the hind legs and a noticeably uneven gait can occur. Affected cats may also have difficulty getting up or lying down.

Diagnosis

DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in cats is usually made through a combination of clinical examination and imaging techniques. The veterinarian will first perform a thorough physical examination, assessing the mobility of the hip joints and the presence of pain.

An X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. examination is the most common imaging procedure for diagnosing HD. This allows the veterinarian to assess the shape and fit of the hip joint and identify signs of dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. or degenerative changes. In some cases, a computed tomography (CT)Computed tomography (CT) is an imaging technique that uses X-rays and computer technology to create cross-sectional images of the body. It enables a detailed view of bones, organs, and other structures and is used for the diagnosis of injuries, diseases, and for planning medical interventions. scan or magnetic resonance imaging (MRI)Magnetic resonance imaging is an imaging technique that uses strong magnetic fields and radio waves to create detailed images of the inside of the body. It is used in veterinary medicine to diagnose diseases of the brain, spine, and other organs. may also be required to obtain more detailed information about the condition of the joint.

In addition, blood tests can be performed to detect inflammatory conditions in the body that may indicate secondary arthritisArthritis is an inflammation of the joints that can cause pain, swelling, stiffness, and limited mobility. There are many forms of arthritis, including rheumatoid arthritis and osteoarthritis., which is often associated with hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip..

Therapy

Treatment for hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in cats depends on the severity of the condition and the individual needs of the cat. In mild cases, conservative treatment with pain relief, anti-inflammatory medication, and dietary supplements to support joint health may be sufficient.

PhysiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. and controlled exercise can help strengthen the muscles around the affected joint and improve mobility. Weight management is also crucial to reduce the load on the hip joints.

In severe cases, surgical intervention may be necessary. Surgical options include femoral head resectionA femoral head resection is a surgical procedure in which the femoral head is removed. This can be considered as a treatment for severe hip joint problems such as hip dysplasia or osteoarthritis in dogs and cats to relieve Pain and improve mobility. (removal of the femoral headThe femoral head is the ball-shaped upper part of the femur that fits into the acetabulum of the pelvis to form the hip joint.), hip replacement surgery, or triple pelvic osteotomyAn osteotomy is a surgical procedure in which a bone is cut or removed to correct alignment or improve a deformed bone structure., where the pelvis is realigned to improve the fit of the joint.

Prognosis and follow-up care

The prognosis for cats with hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. varies depending on the severity of the disease and the chosen treatment. With early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and proper treatment, many cats can lead a near-normal life.

Cats receiving surgical treatment often have a better prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop., especially if the procedure is performed at an early stage of the disease. Conservative treatments can improve quality of life, especially when combined with a suitable diet and regular exercise.

Without treatment, the condition can worsen, leading to chronic pain and limited mobility, which can significantly impair the cat’s quality of life.

Prevention

To minimize the risk of hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in cats, it is crucial to ensure a balanced diet. Overfeeding can lead to overweight, which puts additional strain on the joints. Therefore, the cat’s weight should be monitored regularly to ensure it stays within a healthy range.

Another preventive measure is to ensure sufficient exercise. Regular physical activity strengthens the muscles and supports joint health. Playing and climbing are good ways to keep the cat active and promote its musculature.

Buying cats from responsible breeding is also important. Reputable breeders make sure to test their breeding animals for genetic anomalies such as hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip.. It is advisable to find out about the parent animals and ensure they show no signs of the disease.

Additionally, regular veterinary check-ups can help detect signs of hip problems early. The veterinarian can provide recommendations on diet and exercise and suggest preventive measures if necessary.

These preventive measures can significantly reduce the risk of hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in cats, leading to a healthier and more active life.

Outlook on current research

Hip dysplasia (HD) is a condition that, while more common in dogs, can also occur in cats. Intensive research is being conducted to better understand the genetic causes of this disease. Scientists are investigating specific genes that could play a role in the development of HD to develop targeted breeding programs that reduce the risk of this disease.

Another area of research focuses on improving diagnostic methods. Currently, hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in cats is often diagnosed using X-rays, but researchers are working on developing less invasive and more accurate diagnostic tools. These include the use of 3D imaging techniques and the development of biomarkers that can be detected in the blood.

The treatment of HD in cats is also a major focus of research. New surgical techniques are being developed and tested that are less invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. and allow for a faster recovery. Furthermore, more effective medications are being sought that can alleviate the symptoms of HD without causing significant side effects.

Another exciting area of research is regenerative medicine. Researchers are investigating the use of stem cells to repair damaged joints and promote the regeneration of cartilage and other tissue types. These approaches could offer revolutionary possibilities for treating HD by addressing the underlying damage rather than just alleviating the symptoms.

International cooperation is also an important aspect of ongoing research. Scientists around the world are sharing data and findings to overcome the genetic, diagnostic, and therapeutic challenges associated with HD in cats. These collaborative efforts accelerate progress and increase the likelihood that new and more effective methods will soon be available.

Research into HD in cats also benefits from advances in technology. Modern genome sequencing and data analysis allow researchers to process large amounts of genetic information and identify patterns that would previously have gone undetected. These technological advances help to decode the genetic basis of HD and identify new targets for therapeutic interventions.

Overall, current research into hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in cats shows promising progress. Although many questions remain, there is hope that the combined efforts of scientists and veterinarians will lead to better diagnostic and treatment options. These advances could ultimately significantly improve the quality of life for cats suffering from HD and reduce the prevalence of the disease in the cat populationIn veterinary medicine, the term population refers to a group of animals of a particular species living in a specific geographic area or environment..

Frequently asked questions (FAQs)

What is Hip DysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. in Cats? Hip dysplasiaDysplasia is an abnormal development or growth of cells, tissues, or organs. It can be a precursor to cancer, but does not necessarily lead to cancer. Dysplasia can occur in various parts of the body, including the cervix and hip. is a genetically determined malformation of the hip joint where the femoral headThe femoral head is the ball-shaped upper part of the femur that fits into the acetabulum of the pelvis to form the hip joint. does not fit correctly into the acetabulum. This can lead to pain, lameness, and arthritisArthritis is an inflammation of the joints that can cause pain, swelling, stiffness, and limited mobility. There are many forms of arthritis, including rheumatoid arthritis and osteoarthritis..
How do I know if my cat has HD? Symptoms can include lameness, difficulty jumping, decreased activity, and pain when the hip area is touched. However, an accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. requires veterinary examinations and X-rays.
Which breeds are most commonly affected by HD? While all cat breeds can develop HD, certain breeds such as Maine Coon, Persians, and Siamese cats may be more susceptible due to genetic predispositions.
Can HD be cured in cats? HD cannot be completely cured, but symptoms can be relieved with treatments such as pain medication, physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques., or surgery to improve quality of life.
Is HD hereditary in cats? Yes, HD has a genetic component. Cats descended from parents with HD have a higher risk of also being affected.
What treatment options are available for cats with HD? Treatment options include pain medication, weight management, physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques., and in severe cases, surgical procedures such as femoral head resectionA femoral head resection is a surgical procedure in which the femoral head is removed. This can be considered as a treatment for severe hip joint problems such as hip dysplasia or osteoarthritis in dogs and cats to relieve Pain and improve mobility. or total hip replacement.
Is there anything I can do to reduce the risk of HD in my cat? While genetic factors cannot be changed, a healthy diet, weight control, and regular exercise help to reduce the risk of HD or alleviate the symptoms.
How is HD diagnosed in cats? The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is usually made by clinical examination and X-rays to assess the shape and fit of the hip joint.
Is surgery always necessary for HD? Not always. Mild cases can often be treated with conservative measures such as physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. and medication. Severe cases, however, may require surgical intervention.
How can I help my cat with HD at home? Keep the environment safe and comfortable, avoid jumps from high places, provide soft surfaces to lie on, and make sure they maintain a healthy body weight.

Frequently asked questions (FAQs)

1. What is Hip Dysplasia in Cats?

Hip dysplasia is a genetically determined malformation of the hip joint where the femoral head does not fit correctly into the acetabulum. This can lead to pain, lameness, and arthritis.

2. How do I know if my cat has HD?

Symptoms can include lameness, difficulty jumping, decreased activity, and pain when the hip area is touched. However, an accurate diagnosis requires veterinary examinations and X-rays.

3. Which breeds are most commonly affected by HD?

While all cat breeds can develop HD, certain breeds such as Maine Coon, Persians, and Siamese cats may be more susceptible due to genetic predispositions.

4. Can HD be cured in cats?

HD cannot be completely cured, but symptoms can be relieved with treatments such as pain medication, physiotherapy, or surgery to improve quality of life.

5. Is HD hereditary in cats?

Yes, HD has a genetic component. Cats descended from parents with HD have a higher risk of also being affected.

6. What treatment options are available for cats with HD?

Treatment options include pain medication, weight management, physiotherapy, and in severe cases, surgical procedures such as femoral head resection or total hip replacement.

7. Is there anything I can do to reduce the risk of HD in my cat?

While genetic factors cannot be changed, a healthy diet, weight control, and regular exercise help to reduce the risk of HD or alleviate the symptoms.

8. How is HD diagnosed in cats?

The diagnosis is usually made by clinical examination and X-rays to assess the shape and fit of the hip joint.

9. Is surgery always necessary for HD?

Not always. Mild cases can often be treated with conservative measures such as physiotherapy and medication. Severe cases, however, may require surgical intervention.

10. How can I help my cat with HD at home?

Keep the environment safe and comfortable, avoid jumps from high places, provide soft surfaces to lie on, and make sure they maintain a healthy body weight.