Why Is My Rabbit Suddenly Not Using Its Back Legs? Causes of Hind-Limb Weakness

Rabbits rely on their powerful back legs for everything from hopping and exploring to standing up for a favorite treat. So, seeing your rabbit suddenly struggle to stand, hop, or move normally can be alarming. A rabbit unable to use their back legs needs prompt veterinary attention because hind-limb weakness can have many causes, including injuries and neurological conditions. At South Texas Avian & Exotic Hospital in San Antonio, our veterinarians have specialized experience diagnosing and treating health concerns in rabbits and other exotic pets.

What Can Cause Hind-Limb Weakness in Rabbits?

Hind-limb weakness can range from a subtle change in movement to a rabbit dragging their back legs or being unable to move them at all. The problem may develop suddenly or become more noticeable over time.

Some possible causes include:

• Spinal injuries: Rabbits have strong hind legs, but relatively delicate spines. A fall, accident, improper handling, or forceful kicking while struggling can cause a spinal fracture, dislocation, or spinal cord injury.
• E. cuniculi infection: Encephalitozoon cuniculi, commonly called E. cuniculi or EC, is a microscopic parasite that can affect a rabbit’s nervous system and kidneys. Neurological signs can include hind-limb weakness, difficulty walking, head tilt, and paralysis.
• Arthritis and other painful conditions: Older rabbits may develop arthritis or other musculoskeletal problems that make standing, hopping, and positioning their hindquarters difficult.
• Nerve or neurological disorders: Problems involving the brain, spinal cord, or peripheral nerves can interfere with a rabbit’s ability to control the hind legs.
• Other illnesses: Infections, nutritional or metabolic imbalances, toxins, and other systemic conditions may sometimes contribute to weakness or neurological symptoms.

Because so many different conditions can produce similar symptoms, the way your rabbit moves isn’t enough to determine the cause at home.

When Is Rabbit Paralysis an Emergency?

Sudden hind-limb weakness or rabbit paralysis should be treated as an urgent medical concern, especially if your pet was previously moving normally. Even if your rabbit still has some movement in the hind legs, don’t wait to see whether the problem improves on its own.

Other concerning signs may include:

• Loss of balance or coordination
• Head tilt or unusual eye movements
• Loss of bladder or bowel control
• Signs of pain or distress
• Reduced appetite or refusal to eat
• Fewer or no droppings
• Lethargy or collapse

Rabbits often hide signs of illness, so a noticeable change in mobility may indicate a significant problem. Prompt evaluation can also help your veterinarian manage pain and address complications associated with reduced mobility.

What Should You Do if Your Rabbit Is Dragging Their Back Legs?

If you find your rabbit dragging their back legs, minimize unnecessary movement until they can be examined. If a spinal injury is possible, handle your rabbit gently and support the entire body when transferring them to a secure carrier. Soft towels or blankets can help provide cushioning and prevent sliding during transportation.

Don’t attempt to stretch or manipulate the legs, and don’t give medications unless specifically directed by a veterinarian. Many medications commonly used for people or other pets aren’t safe for rabbits.

How Will a Veterinarian Determine the Cause?

Your veterinarian will begin with a physical examination and a detailed history, including when the symptoms began and whether your rabbit has experienced a fall or other injury. Depending on the findings, diagnostic testing may include bloodwork, X-rays, or advanced imaging to look for injuries, infection, or other underlying problems.

Treatment depends on the diagnosis and severity of your rabbit’s condition. Our team may recommend pain management, medication, supportive care, restricted activity, or other treatment tailored to your rabbit’s needs.

Get Help for Your Rabbit’s Hind-Limb Weakness

Whether your rabbit’s mobility has changed gradually or they suddenly can’t use their back legs, don’t delay seeking veterinary care. Early evaluation can help identify the underlying problem and determine the most appropriate next steps.

If you’re concerned about your rabbit’s movement or other signs of illness, call South Texas Avian & Exotic Hospital at (210) 424-1871. Our team can help you determine the appropriate next steps for your rabbit’s care.