Checking a Spitz's patellas before breeding

Know what is being examined

Patellar luxation means the kneecap moves out of its normal position. OFA regards several forms as inherited or suspected to be inherited. Signs vary; assessment belongs to a veterinarian, not an owner following an online manipulation guide.

When booking, explain that the examination is for breeding planning and, if relevant, submission to a particular scheme. Ask whether the clinic uses the required form and what report you will receive. A clinical note and a registry certificate may serve different purposes.

[1] Orthopedic Foundation for Animals — Patellar Luxation

Why the kneecap moves and what an episode looks like

The patella travels in a groove in the femur and helps extend the knee. A shallow groove or misaligned bones and tendons can disrupt that path. A typical episode involves carrying a hind leg for a few steps, then walking normally. Both knees may be affected; progression and arthritis are possible, although some dogs show no obvious lameness.

An episode that disappears still merits discussion. Saying the dog skips describes an observation, not the injured structure. Compare movement before and afterwards; do not try to reproduce the displacement by manipulating the knee yourself.

[2] Cornell University — Patellar luxation

Grades and the information examinations provide

In grade I, the displaced patella returns spontaneously; in grade II, it can remain displaced temporarily. In grade III, it is usually outside the groove but can be reduced; in grade IV, it cannot be reduced. These describe position and stability, not four universally equivalent levels of pain.

The orthopaedist assesses the knee by palpation. Radiographs examine bone shape and associated changes; CT sometimes supports complex planning. The examination and an image therefore answer different questions. Normal walking during a consultation does not make a history of repeated episodes irrelevant.

[3] Merck Veterinary Manual — Patellar Luxation in Dogs and Cats · [4] American College of Veterinary Surgeons — Patellar Luxation

Monitoring and treatment serve different purposes

A mild, symptomless condition may be monitored. Clinical signs can lead to discussion of weight management, suitable exercise and pain relief; persistent lameness or substantial abnormalities may require surgery. Surgical correction changes knee mechanics, not the dog's genetic background.

Do not delay necessary care to preserve a future breeding assessment. Agree the immediate goal: comfortable movement and useful function. Discuss breeding separately using the original diagnosis. A successful recovery cannot be recorded as proof that disease was absent before surgery.

[2] Cornell University — Patellar luxation · [5] North Downs Specialist Referrals — Patellar Luxation

Check the actual report

Match the dog's name, identification, examination date and examiner details. Look for separate findings for the right and left sides. If the report contains only an abbreviation or number, ask the vet to explain the grading system rather than translating it yourself into “healthy”.

Account for age and the chosen scheme

OFA issues a normal certification number from 12 months; earlier examinations are preliminary. It also recommends later rechecks. These are conditions of that scheme, not a universal minimum breeding age.

Ask your club which examination and age it accepts. If a dog was examined abroad, submit the original result before travelling. Agreeing the format in advance avoids finding that a useful clinical examination cannot be used for the registration you need.

[1] Orthopedic Foundation for Animals — Patellar Luxation

Prepare questions for the orthopaedist

Ask for the medical interpretation separately from whether the form meets registry requirements. If an abnormality is found, discuss the dog's welfare and the justification for breeding, rather than seeking convenient wording. The following questions support that discussion; they do not establish eligibility.

• What was found on each side?
• Is further information or another examination needed?
• How does the result affect this dog's breeding plan?
• Which records from relatives or earlier offspring would be useful?
• What should we do if movement changes after the examination?

Keep the history, not just the best result

Retain earlier findings and explanations for differences between examinations. Share the agreed records without selectively removing unwelcome pages. List unresolved questions and who will clarify them. Arrange a mating after this review is complete and both owners understand the information available.