AUTHOR: Dr Johan Nel, Fourways Veterinary Hospital and Specialist Referral Centre

Developmental orthopaedic disease is a major contributor to chronic pain and osteoarthritis in dogs. Importantly, many of these conditions originate during rapid skeletal growth — long before obvious lameness develops. Traditionally, intervention occurred only once clinical disease became apparent. At that stage, treatment often focuses on pain management or salvage surgery rather than restoration of normal joint biomechanics.

Modern orthopaedics has shifted toward preventive intervention, where early identification allows correction during growth while joints remain biologically adaptable. In practical terms: Early diagnosis may convert a lifelong disease into a preventable condition.General practitioners are uniquely positioned to make this difference.

Most affected dogs present repeatedly during their first year of life for vaccinations and wellness examinations. These visits provide ideal screening opportunities. Juvenile orthopaedic disease should be suspected even when puppies appear clinically normal.

Include orthopaedic screening when:

• Examining medium to giant breed puppies.
• Assessing rapidly growing juveniles.
• Investigating intermittent or shifting lameness.
• Owners report reduced activity or exercise intolerance.
• Breed predispositions exist.

Practical screening timeline for growing dogs

Age	Condition to Screen
12–16 weeks	Hip laxity (juvenile pubic symphysiodesis window)
4–6 months	Elbow dysplasia/limb deformity
5–10 months	OCD lesions
6–7 months	Triple pelvic osteotomy reassessment
16–24 weeks	Ununited anconeal process confirmation
6–18 months	Humeral intra-condylar fissure
Any age	Patellar luxation

Why early detection matters

The surgical options available depend almost entirely on age:

Procedure	Age Window
Juvenile pubic symphysiodesis	12–16 weeks
Triple pelvic osteotomy/double pelvic osteotomy	<8–10 months
Total hip replacement	Skeletally mature
Femoral head and neck excision	Salvage option

Once arthritis develops, preventive options are lost.

Clinical Insight  – ‘The Silent Puppy’

Hip dysplasia: Timing is everything

Hip dysplasia begins as joint laxity, not arthritis. Osteoarthritis develops later as a consequence of abnormal biomechanics. Early screening includes:

• Gait assessment
• Muscle symmetry evaluation
• Sedated Ortolani testing
• Screening radiographs

Many puppies with significant hip laxity:

• Show no overt lameness.
• Remain active.
• Present only later with irreversible degeneration.

Absence of lameness does not equal absence of disease.

Elbow dysplasia: Often underdiagnosed

Elbow dysplasia represents a group of developmental disorders including:

• Medial coronoid disease (fragmented medial coronoid process).
• Ununited anconeal process.
• Osteochondrosis.
• Radio-ulnar incongruity.

Clinical signs are frequently subtle:

• Intermittent forelimb lameness.
• Stiffness after rest.
• Reduced willingness to exercise.

Radiographs may appear normal despite significant pathology. CT imaging is currently the most sensitive diagnostic modality for elbow disease. Early arthroscopy allows both diagnosis and treatment in the same procedure.

Growth-dependent corrective procedures

Certain orthopaedic procedures rely on active skeletal growth. Examples include:

• Distal dynamic ulnar ostectomy.
• Growth modulation procedures.
• Early incongruity correction.

These procedures may no longer be possible once skeletal maturity is reached. Delayed referral therefore directly limits treatment options.

Osteochondritis dissecans

Osteochondritis dissecansresults from abnormal cartilage maturation during growth, producing cartilage fissures or detached fragments.

Commonly affected joints:

• Shoulder.
• Elbow.
• Stifle.
• Tarsus.

Typical patients:

• Large or giant breed dogs.
• Rapid growth phase.
• Five to 10-months of age.

Early arthroscopic management improves outcomes by limiting cartilage damage.

Patellar luxation and limb alignment disorders

Patellar luxation is frequently developmental rather than traumatic. Early recognition allows identification of:

• Femoral varus deformity.
• Tibial torsion.
• Extensor mechanism malalignment.

Correction performed during growth may prevent progressive joint degeneration and complex reconstruction later in life.

Angular limb deformities

Premature physeal closure or asynchronous growth between paired bones commonly results in angular deformities. Clinical indicators include:

• Carpal valgus or varus.
• Limb rotation
• Asymmetric limb length.
• Progressive gait abnormality.

Diagnostic principles:

• Always radiograph both limbs.
• Sedation improves accuracy.
• Computed tomography enables precise surgical planning using center of rotation of angulation analysis.

Early intervention significantly improves prognosis.

High-risk but easily missed conditions

• Legg–Calvé–Perthes disease: Toy breeds aged four to 12-months presenting with hindlimb lameness.
• Ununited anconeal process: Diagnosis confirmed >22-weeks once fusion should occur.
• Humeral intracondylar fissure:Common in Spaniels and French Bulldogs; predisposes to catastrophic humeral fracture. Frequently bilateral.

When should a GP refer?

Consider referral when:

• Persistent juvenile lameness.
• Joint effusion in a young dog.
• Positive Ortolani sign.
• Limb deformity or asymmetry.
• Predisposed breed with subtle signs.
• Radiographs inconclusive but suspicion remains.

Early referral expands treatment options — late referral limits them.

The GP’s role in lifelong orthopaedic health

Successful management of developmental orthopaedic disease depends less on surgical technique and more on timely identification. General practitioners play the central role by:

• Recognising risk early.
• Educating owners.
• Initiating screening.
• Referring within corrective treatment windows

Collaboration between primary care veterinarians and referral centres allows intervention before permanent joint damage develops.

Key take-home messages

• Developmental orthopaedic disease begins early in life.
• Many affected puppies show minimal clinical signs.
• Screening should be age- and breed-based.
• Corrective options are highly time dependent.
• Early detection dramatically improves long-term mobility and quality of life.

Conclusion

Juvenile orthopaedic screening represents one of the most powerful preventive tools available in small animal practice. By shifting focus from treating established arthritis to identifying developmental disease during growth, veterinarians can fundamentally change patient outcomes. Early recognition, client education, and appropriate referral remain the cornerstones of successful preventive orthopaedics.