Femoral Head and Neck Excision (FHO) in Dogs: What It Is, Who It’s For, and How Rehab Improves Outcomes (Darlington)

If your dog has hip pain and you’ve been told they may need surgery, you might hear terms like “FHO”, “femoral head ostectomy”, or “femoral head and neck excision.” It can be a lot to take in, especially when you’re trying to balance pain relief, long-term mobility, and what’s realistic for your dog.

At Butterwick Animal Rehab Clinic, we support dogs before and after hip surgery with physiotherapy and hydrotherapy. For the right dog, an FHO can work very well, but rehab is not optional if you want the best outcome. And if your dog is larger, heavier, or very active, we can help you understand whether total hip replacement (THR) may be a better fit, or whether conservative rehab can improve comfort and function first.

Not sure what your dog needs next? Get in touch for expert advice or to book an assessment.

What is a femoral head and neck excision (FHO) in dogs?

A dog’s hip is a ball and socket joint. The “ball” is the femoral head at the top of the thigh bone, and it sits in the “socket” of the pelvis.

In an FHO, the surgeon removes the femoral head and neck. That sounds extreme, but the goal is to remove the painful bone on bone contact in a damaged hip joint. Over time, the body forms a functional “false joint” made of scar tissue and muscle support, which can allow comfortable movement.

An FHO is sometimes recommended for:

• Hip dysplasia with pain that is not responding to conservative management
• Severe hip arthritis
• Hip luxation (dislocation) in some cases
• Legg Calvé Perthes disease (more common in smaller breeds)
• Certain fractures or hip joint problems where other options are not suitable

Your vet or orthopaedic surgeon will advise whether FHO is appropriate for your dog’s specific problem.

Does FHO work well in dogs?

It can work very well, especially for the right dog, but outcomes depend on several factors, including:

• Size and bodyweight
• Muscle mass and fitness before surgery
• Pain levels and how long the problem has been present
• How consistently rehab is done after surgery
• Whether there are other issues affecting movement (knee, spine, other hip)

In general, smaller dogs often do very well. Larger, heavier, or very athletic dogs can still do well, but they may be more likely to need excellent rehab and careful conditioning to achieve the best function.

FHO vs total hip replacement (THR): what’s the difference?

Owners often compare FHO and THR because both are used for painful hip problems, but they are very different.

• FHO removes the painful joint surfaces and relies on a functional false joint forming over time
• THR replaces the hip joint with an artificial joint designed to recreate more normal mechanics

For some dogs, THR may offer the best chance of near-normal hip function. For others, FHO is a sensible option that can provide good comfort and function, especially when rehab is done properly. If you’re unsure, we can help you understand what each option means in real life, and how rehab fits into both.

What does recovery involve after FHO?

Recovery is staged and should follow your surgeon’s protocol. In general, the early phase focuses on comfort and safe movement, then gradually progresses to rebuilding strength, range of motion, and normal use of the leg. A common challenge after FHO is that dogs learn to not use the operated leg because it has been painful for a long time. Rehab helps break that pattern and rebuild confident, balanced movement.

How physiotherapy helps after FHO

Rehab is a major part of success after FHO. Physiotherapy can help by:

• Encouraging safe, confident use of the operated leg
• Rebuilding muscle and strength around the hip
• Improving range of motion and reducing stiffness
• Addressing compensation patterns (back, knees, front end)
• Progressing walking and exercise without flare-ups
• Giving you a clear home plan you can stick to

We tailor the plan to your dog’s personality, your home setup, and your schedule. Consistency matters more than perfection.

Can hydrotherapy help after FHO?

Hydrotherapy can be very useful for many dogs after FHO because it can help rebuild strength with less impact. It can also help dogs practise a better gait pattern in a controlled way. Timing is case-dependent and should follow your vet or surgeon’s guidance, especially around wound healing and readiness.

Home setup: simple changes that make a big difference

• Non-slip runners on smooth floors
• Block stairs and prevent jumping on and off furniture
• Use a harness for support when needed
• Short, controlled lead walks rather than free running
• Keep nails trimmed to reduce slipping
• A calm routine so your dog doesn’t overdo it on a good day

When to call your vet

Contact your vet promptly if you notice:

• Sudden worsening lameness or refusal to weight-bear
• Significant swelling, heat, discharge, or a bad smell from the incision
• Persistent vomiting or signs of medication intolerance
• Marked lethargy, fever, or your dog seems unwell
• Any slip, fall, or incident that worries you

FHO surgery in dogs: FAQs

How long does it take a dog to recover from FHO surgery?

It varies and should follow your surgeon’s protocol. Recovery is usually staged. The goal is steady progress without setbacks, and rehab plays a big role in the final outcome.

Is FHO only for small dogs?

No, but size and bodyweight can influence outcomes. Many smaller dogs do extremely well. Larger dogs can also do well, but they often need excellent rehab and conditioning to achieve the best function.

Will my dog walk normally after FHO?

Some dogs return to very good function. Others may have a slightly different gait, especially at faster speeds. The biggest factors you can control are rehab consistency, strength, and weight management.

Is FHO better than a hip replacement?

It depends on the dog and the goals. THR can offer more normal mechanics for some dogs, but it’s major surgery and not right for every case. FHO can be a very good option, especially when rehab is done properly.

Can rehab help my dog avoid surgery?

Sometimes, yes. Many hip dysplasia dogs improve significantly with a structured plan. Even if surgery is still needed, rehab can improve comfort and make your dog a better candidate.