This page presents the latest statistics of Japanese Spitz PRA-rcd4 Program genetic testing results. These results are contributed by breeders and owners who join in our program. The goal is to build a clear picture of how this mutation is distributed in the Japanese Spitz population. We also aim to support responsible breeding decisions.
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Current Statistics
These numbers are based on voluntary submissions. The picture will become more precise as more Japanese Spitz owners and breeders contribute results.
Notice: Statistic for now is for contributors only.
Please
with the email you used when submitting your PRA‑rcd4 test result.
Objectives of the Program
- Increase Transparency – Collect and share PRA-rcd4 DNA test results among breed clubs , kennels across the world
- Support Breeding Decisions – Offer reliable information to avoid producing affected puppies.
- Preserve Genetic Diversity – Encourage thoughtful use of carriers rather than removing valuable lines.
- Build Global Cooperation – Connect national clubs, breeders, and owners in a shared database.
- Track Long-Term Health – Track clinical cases alongside DNA results to better understand PRA-rcd4.
Understanding the Results
- Clear (WT/WT) – The dog does not carry the PRA-rcd4 mutation. It can’t develop this form of PRA and can’t pass it on.
- Carrier (WT/MUT) – The dog carries one copy of the PRA-rcd4 mutation. It will not develop the disease but can pass the mutation to offspring. Safe breeding is possible when paired with a clear.
- Affected (MUT/MUT) – The dog carries two copies of the PRA-rcd4 mutation. It is at risk of developing late-onset PRA, usually after age 10. Should only be bred to clear (if used at all) to avoid producing affected puppies.
Why It Matters
- Carriers are not sick. With correct breeding (carrier × clear), no affected puppies will be born.
- Testing protects the breed. Hidden carrier combinations are the only risk for producing affected puppies.
- Every contribution counts. By sharing results, you help ensure the future health and genetic stability of the Japanese Spitz.
How to Send Your Results
- Test your Japanese Spitz for PRA-rcd4 at a recognized genetic lab.
- Once you get the results, go to our submission form: Send your results via Google Form
- Fill in your dog’s details (name, pedigree number or chip ID, sex, parents’ names).
- Upload the PDF certificate from the lab.
- Choose whether your dog’s result can be made public or only shared within breeding committees.
- Send the form. You will get a confirmation email with a link to edit your entry later if needed.
Notice: If your dog is reported as affected by this mutation, and at least 8 years old. Please schedule an ECVO eye examination. Check for clinical signs. Upload the ECVO certificate later or together with the genetic test.
Update Schedule
The statistic will be published 1 time per mount. Please check back for the latest figures.
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