If your dog or cat has been diagnosed with a painful hip condition, your veterinarian may recommend FHO surgery (Femoral Head Ostectomy) as a treatment option. This orthopedic procedure is commonly used to relieve pain and restore mobility in pets suffering from conditions like hip dysplasia, trauma, or chronic joint degeneration. It’s especially suitable for small to medium dogs and cats—and often offers excellent outcomes when combined with rehabilitation.
In this guide, we’ll break down what FHO surgery involves, when it’s recommended, what to expect from the procedure and recovery, and why it may be the right fit for your pet—especially if you’re seeking expert orthopedic care in Long Island.
How the Hip Joint Works (And Why FHO Surgery May Be Needed)
To better understand FHO surgery, it’s helpful to first look at how the hip joint functions. The hip is a ball-and-socket joint: the rounded head of the femur (the “ball”) fits into the acetabulum of the pelvis (the “socket”). In a healthy pet, cartilage lines the joint and facilitates smooth, pain-free motion.
However, trauma, joint disease, or developmental disorders can damage this cartilage or misalign the joint, leading to:
- Bone-on-bone contact
- Chronic inflammation
- Limping or lameness
- Pain, especially when bearing weight or rising
FHO surgery involves surgically removing the femoral head and neck. Once these structures are removed, the body forms a pseudoarthrosis (false joint) made of scar tissue. This false joint eliminates direct bone contact, helping restore pain-free function—particularly in animals that weigh less than 50 pounds.
What Is FHO Surgery and When Is It Recommended?
Femoral Head Ostectomy is considered a salvage procedure—not meant to replicate a natural joint but to allow functional, pain-free movement. It’s typically recommended in the following cases:
- Hip dysplasia that no longer responds to medical management
- Chronic dislocations that are unstable or painful
- Fractures involving the femoral head or neck
- Legg-Calvé-Perthes disease, commonly seen in small breed dogs
- Severe arthritis that limits daily function
FHO is often a cost-effective alternative to total hip replacement, which may not be feasible due to finances, patient size, or other medical concerns. It’s especially useful in smaller pets that can easily adapt to the formation of a pseudoarthrosis.
It is a frequently performed orthopedic procedure, especially in referral settings or in general practices working with mobile surgical teams. For orthopedic conditions affecting the knee rather than the hip, there are other surgical techniques available for treating CCL injuries in dogs.
Diagnostic Evaluation and Preoperative Planning
Before scheduling surgery, your veterinarian will conduct a full orthopedic evaluation to determine whether your pet is a good candidate. This may include:
- A physical examination and gait analysis
- Palpation to check for joint instability, pain, or muscle atrophy
In cases where knee instability is suspected rather than hip pain, your vet may also assess for signs of ACL injuries. - Radiographs (X-rays) of the hips and pelvis
- Basic bloodwork to assess organ function and anesthetic safety
FHO tends to work best in pets with a lean body condition and good muscle tone in the hind limb. Pets over 50 lbs may also benefit, but outcomes are more variable and often depend on a committed rehab effort and the pet’s individual tolerance for limb adaptation.
Ideal Candidates for FHO Surgery
FHO is most successful in:
- Cats, who typically recover with excellent outcomes
- Small to medium dogs (under 50 lbs)
- Pets with good hind limb strength and muscle mass
- Owners willing to engage in rehabilitation after surgery
In larger breed dogs, FHO can still be considered if other options are not viable. Although mild limping or decreased range of motion may persist, many large dogs still achieve a significant reduction in pain and improved function.
Your veterinarian will weigh your pet’s age, weight, overall health, and activity level to determine if FHO is the right option.
Postoperative Care and Recovery
Every pet heals differently. Recovery protocols after FHO surgery vary by case and by surgeon. While a few key milestones are common, it’s important to avoid comparing your pet’s progress to generic, rigid week-by-week guidelines and instead focus on your veterinarian’s specific instructions.
Immediate Postoperative Period:
- Pain medication and/or anti-inflammatories will be prescribed
- Antibiotics may be given
- Sedatives may be prescribed to prevent trauma to the new surgical site
- Exercise restrictions will be described in discharge instructions
While owners will be instructed to restrict excessive exercise, it is important for your pet to be able to gently walk around a small area on a non-slippery surface to promote joint healing. This does not mean pets should be taken on long walks outside of the home or allowed to run, jump, and play as this could damage the surgical site rather than help heal it. This rule applies to both dogs and cats who undergo FHO procedures.
Rehabilitation (Critical for Recovery):
Once the incision has healed, gradual movement is encouraged. The goal is to prevent joint stiffness and muscle atrophy. Depending on availability and pet temperament, rehabilitation may include:
- Supervised leash walking
- Passive range-of-motion exercises at home
- Underwater treadmill therapy (when available and appropriate)
Your veterinarian or rehab therapist may recommend additional strategies, such as cold laser therapy or structured exercise routines. Early limb use is strongly encouraged—as long as it’s controlled and not painful—to help the pet adjust to the new biomechanics of the limb.
Long-Term Outlook After FHO
The ultimate goal of FHO surgery is to eliminate pain and allow functional use of the limb. While pets won’t have a “normal” hip joint, the vast majority regain full or near-full use of the leg, particularly when rehabilitation is provided.
Long-term expectations:
- Return to comfortable walking, running, and even playing
- Mild muscle loss or stiffness may persist in some cases
- Slight gait abnormality is possible, especially in large dogs
- No recurrence of hip arthritis, since the joint is removed
Many owners report their pets become noticeably happier, more playful, and more willing to move after the procedure—especially if they were suffering from chronic hip pain beforehand.
In our experience working with pets, most cats and small dogs recover exceptionally well, while larger breeds often require a more involved rehabilitation plan but still show significant improvement. Most cats adapt exceptionally well after FHO surgery, especially when arthritis is identified and managed properly. For more insights into how osteoarthritis affects cats and the available treatment options, explore our article on Osteoarthritis in Cats.
FHO Surgery: Is It Right for Your Dog or Cat?
Femoral Head Ostectomy (FHO) is a trusted and effective option for treating hip disorders like dysplasia, arthritis, and trauma in dogs and cats. Especially in small to medium-sized pets, FHO can significantly reduce pain and restore mobility—even without recreating a natural joint.
If you’re located on Long Island or nearby, our experienced surgical team offers mobile orthopedic services directly to your local veterinary clinic. This means your pet can receive advanced surgical care in a familiar setting, supported by the team you already trust.
If you’re exploring options after your pet’s diagnosis, our team is prepared to work with your pet’s general practitioner if mobile surgery is right for you. Don’t hesitate to reach out if you have questions about connecting with our team.
