Dog Back Legs Are Weak and Collapsing – Old Dog Advice

If you’re a dog owner, it’s important to be aware of the signs of back leg weakness in your furry friend. While it’s normal for dogs to experience some degree of joint stiffness as they age, persistent weakness or collapsing of the hind legs can be a sign of a more serious underlying condition.

There are several potential medical reasons a dog may experience weakness or lack of control in their hind legs. Common issues include damage or problems with the discs in the spine which can put pressure on the spinal cord. Over time, arthritis or hip dysplasia from joint problems may lead to weaker hind legs due to pain.

Neurological conditions could also be a factor, such as injuries or diseases that impact the spinal cord or nerves. This may result in sudden weakness or paralysis. In some cases, an underlying systemic illness affecting the whole body could be the cause of hind leg weakness in dogs.

In this article, our team of vets will guide you through the common causes of hind leg weakness in dogs and treatment options.

Understanding Hind Leg Weakness in Dogs

If you have noticed that your dog is having difficulty standing up or walking, it could be a sign of a more serious alignment that is causing their back legs to collapse.


There are several reasons why a dog may experience weakness in their back legs. Some of the most common causes include:

  • Intervertebral disc disease (types I and II)
  • Spinal stroke
  • Arthritis
  • Hip dysplasia
  • Degenerative myelopathy
  • Systemic disease
  • Toxin exposures
  • Immune mediated diseases

Keep in mind that as dogs age, rear leg weakness can also be a natural part of the aging process. As dogs get older, their muscles and joints may become weaker and less flexible, which can make it more difficult for them to move around.

Keep An Eye Out

You may also want to keep an eye out for other signs of hind leg weakness. These behaviors would be important to communicate with your vet: Some common signs to watch for include:

  • Difficulty standing up or walking
  • Avoidance of stairs
  • No longer enjoying long walks or exercise
  • No longer jumping up on the bed or sofa (if that was previously accepted behavior)
  • Walking with a “bunny hop”
  • Hind leg tremors

Typically these symptoms are something you will see in elderly dogs. Depending on the breed, typically around 8 years of age or older. Unfortunately, bulldogs may be slightly earlier at around 6 years of age.

English bulldog sits diagram

Treatment Options

If your dog’s back legs are weak and collapsing, there are several treatment options available. The most appropriate treatment will depend on the underlying cause of the problem. Here are some of the most common options:


In some cases, medication may be prescribed to help alleviate the symptoms of back leg weakness in dogs. For example, nonsteroidal anti-inflammatory drugs (NSAIDs) may be prescribed to help reduce pain and inflammation associated with conditions such as arthritis.

Other medications, such as corticosteroids, may be used to help reduce inflammation and swelling in the spinal cord.

Physical Therapy

Physical therapy can be a helpful treatment option for dogs with weak or collapsing back legs. This may involve exercises to help improve strength and mobility in the affected legs, as well as massage and other techniques to help alleviate pain and stiffness.

In addition, your veterinarian may recommend the use of assistive devices, such as harnesses or carts, to help your dog get around more easily.


In some cases, surgery may be necessary to address the underlying cause of your dog’s back leg weakness. For example, if your dog has a herniated disc in their spine, surgery may be necessary to remove the disc and alleviate pressure on the spinal cord. Other surgical options may include joint replacement surgery for dogs with severe arthritis or hip dysplasia.

It is important to work closely with your veterinarian to determine the best course of treatment for your dog’s specific needs. With proper care and treatment, many dogs with weak or collapsing back legs are able to maintain a good quality of life and enjoy many happy years with their families.

Prevention and Management

Diet and Exercise

Maintaining a healthy diet and exercise routine for your dog is crucial in preventing weak and collapsing back legs. Providing your dog with a balanced diet that meets their nutritional needs can help prevent obesity and reduce the risk of joint problems that can lead to weak back legs. Additionally, regular exercise can help strengthen your dog’s muscles and improve their overall health.

Consider incorporating low-impact exercises into your dog’s routine, such as swimming or walking on soft surfaces, to reduce the strain on their joints. It’s important to consult with your veterinarian before starting any new exercise routine to ensure it’s appropriate for your dog’s individual needs.

Regular Check-Ups

Regular check-ups with your veterinarian can help detect and manage any underlying conditions that may be causing your dog’s back legs to weaken. During these check-ups, your veterinarian can perform a physical exam and recommend any necessary diagnostic tests, such as X-rays or blood work, to identify any underlying health issues.

Early detection and management of underlying conditions, such as arthritis or hip dysplasia, can help prevent the progression of these conditions and reduce the risk of your dog’s back legs collapsing. Additionally, your veterinarian can recommend appropriate treatment options and provide guidance on managing your dog’s condition at home.

Concluding Thoughts

In conclusion, there are various reasons why your dog’s back legs may be weak and collapsing. It is important to pay attention to your dog’s behavior and seek veterinary care if you notice any changes in their mobility.

Some common causes of back leg weakness in dogs are intervertebral disc disease, spinal stroke, arthritis, hip dysplasia, degenerative myelopathy, and systemic disease. Less common causes are due to toxin exposures and immune-mediated diseases.

Your vet may recommend a variety of treatments, such as medication, physical therapy, or surgery, depending on the underlying cause of the weakness.

Frequently Asked Questions

What are the signs of nerve damage in a dog’s hind legs?

Nerve damage in a dog’s hind legs can cause a variety of symptoms, including weakness, trembling, and loss of coordination. Other signs of nerve damage may include dragging of the hind legs, difficulty standing up or lying down, and loss of bladder or bowel control.

What are some ways to provide back leg support for older dogs?

As dogs age, they may experience weakness or collapse in their hind legs. One way to provide support is to use a dog wheelchair or harness to help them walk. Another option is to use orthopedic braces or boots to provide extra support and stability.

How can you help a dog that suddenly can’t walk on their back legs?

If your dog suddenly can’t walk on their back legs, it is important to seek veterinary care immediately. In the meantime, you can support your dog by gently lifting their hindquarters and helping them move around or creating a sling from a towel.

What are the signs that a senior dog may be suffering?

Senior dogs may experience a variety of health issues, including arthritis, cognitive dysfunction, and cancer. Signs that your senior dog may be suffering include decreased appetite, lethargy, difficulty walking or standing, and changes in behavior or temperament.


  • Brad

    Hi I'm Brad, the founder of Having been a vet of 6 years I work alongside our team to provide valuable insight into your dog's health. I have a frenchie myself named Senzu who is my pride and joy!

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