Femoral head ostectomy—usually called FHO—is a surgery that removes the head of the femur (the “ball” of the hip joint) so that the joint forms a false joint from scar tissue instead of bone grinding on bone. It is most often done for severe hip pain, hip dysplasia, fractures, or other conditions when the hip cannot be saved. FHO is different from many other orthopedic surgeries in one important way: the long-term result depends less on the surgery itself than on the rehabilitation that follows. A dog that rebuilds strength and uses the leg early usually does well; a dog that never uses the leg may not.
Why early movement matters after FHO
After FHO, the body forms a new “false joint” made of scar tissue, and the quality of that joint depends on how the leg is used while it forms. A dog that keeps the leg lifted and unused may develop a stiff, painful result; a dog that bears weight and moves the leg through a good range encourages a flexible, functional false joint. This is why surgeons often encourage early, controlled use of the leg—within the limits of pain control—rather than the long rest periods used after some other surgeries.
The first days after surgery
In the first days, the focus is pain control and protecting the incision. Your dog will come home with pain medication, and keeping pain controlled is essential because a painful dog will not use the leg. Expect a quiet first day or two: limited movement, short leashed potty breaks, and plenty of rest. Some dogs begin touching the toes down within days; others take longer. Check the incision twice a day and report any worsening redness, swelling, or discharge.
The recovery phases
| Phase | Focus | What this usually means at home |
|---|---|---|
| First 1–2 weeks | Pain control and early weight-bearing | Short, frequent, leashed walks encouraged as the surgeon directs; no running or jumping |
| Weeks 2–6 | Rebuild strength and range of motion | Gradually longer controlled walks; surgeon-approved exercises; the leg should be used more each week |
| Weeks 6–12 | Conditioning and return to normal activity | Progress toward normal walks and play as cleared; continued strengthening |
Many surgeons expect meaningful improvement by the end of the first month, with continued gains over several months. Full results can take months as the false joint matures and muscles rebuild.
Rehabilitation is not optional after FHO
If there is one surgery where home rehabilitation determines the outcome, FHO is it. Your veterinary team may prescribe specific exercises, or refer you to a rehabilitation professional who can design a program. Common elements include:
- encouraging weight-bearing with short, frequent walks;
- passive range-of-motion exercises taught by a professional;
- sit-to-stand and gentle strengthening exercises;
- balance work as strength returns.
Do not improvise these exercises. Have them demonstrated, perform them exactly as instructed, and stop if your dog shows real pain rather than mild effort.
Encouraging your dog to use the leg
Some dogs need encouragement to bear weight on the operated leg, especially in the early weeks. What helps:
- short, frequent walks on level ground so the leg gets regular use without fatigue;
- slow walks on gentle slopes or uneven (but safe) surfaces to encourage a fuller stride, only if the surgeon approves;
- using treats to encourage small steps and turns;
- keeping sessions short enough that the dog does not tire and start lifting the leg.
If your dog consistently refuses to use the leg or seems painful, tell your veterinary team—pain control or the plan may need adjusting.
What to avoid
- long rest without movement—the opposite of what FHO recovery needs;
- running, jumping, and rough play in the early weeks;
- forcing painful movement or pushing through signs of real pain;
- slippery floors that make the dog afraid to bear weight.
Red flags that need a call
- the dog stops using the leg after starting to use it;
- pain that is not controlled by the prescribed medication;
- spreading redness, swelling, discharge, or an opening incision;
- refusing food, vomiting, or signs of illness;
- no improvement in leg use over several weeks despite following the plan.
The outcome is built in the months after surgery
FHO recovery asks a lot of the owner: keep pain controlled, encourage daily use of the leg, do the prescribed exercises, and be patient while the false joint forms and muscles rebuild over months. The reward is usually a comfortable, functional leg—many dogs return to walking, playing, and living normally. If your veterinary team recommends FHO, go into it knowing that the surgery removes the painful joint, and the rehabilitation you do afterward decides how well your dog moves on the new one.
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