Health Testing Guide
Welsh Terrier Health Testing Guide
Which tests are mandatory, how to spot responsible breeders — and what it costs when things go wrong.
For the Welsh Terrier we have compiled 0 mandatory and 1 recommended health tests, drawn from breed-club regulations, the University of PEI (CIDD), and OMIA — weighted by severity and heritability.
What this grade means
The Welsh Terrier is a robust and hardy breed, yet prospective buyers should be aware of hereditary conditions such as Primary Lens Luxation (PLL) and glaucoma, which can lead to blindness in severe cases. Hip dysplasia (HD) also occurs occasionally. As there are currently no strictly mandated health tests for this breed, it is essential that you critically verify the eye examination results of the parent dogs before purchasing a puppy.
What is health testing?
Every breed is susceptible to certain inherited conditions. Just like humans, dogs inherit predispositions from their parents. Responsible breeders screen their breeding dogs for these conditions and make informed mating decisions to reduce the risk passed on to puppies.
Can health testing guarantee a healthy puppy?
No — but it's the strongest tool we have. Diet, exercise, environment, and genetics all contribute to whether a dog develops a condition. When breeders use the right tests to identify risk in potential parents, the likelihood of many conditions appearing in the puppies drops significantly.
Health issues vary widely across breeds
There's no one-size-fits-all here. For the Welsh Terrier we track 0 mandatory tests plus 1 additional recommended ones. The specific tests and passing thresholds are detailed further below.
Keep in mind
Reliable screening tests still don't exist for many hereditary conditions, and tests for complex polygenic conditions are not always predictive of severity in the puppies. Even so, they're a powerful tool used by every responsible breeder.
Genetic vs phenotypic — and why the difference matters
There are two main types of health tests:
Genetic tests
Screen the dog's DNA for known disease-causing mutations. Can be performed from puppyhood and give a binary result (clear / carrier / affected).
Phenotypic tests
Clinical and imaging exams like X-ray, ultrasound, or ophthalmoscopy. They show how a predisposition actually manifests — usually only conclusive after 12–18 months.
Our health testing levels for the Welsh Terrier
We group breeding programs into three levels based on testing depth. Ask your breeder directly which level they meet.
A breeder at the Great level performs all mandatory tests plus 1 additional clinically recommended screenings that reduce risk in this breed.
In addition to mandatory tests:
Lens luxation(PLL)
Augen und Sehvermögen
Lens luxation is an inherited eye disorder where the lens slips out of its normal position because the supporting fibers holding it in place weaken or break. When the lens shifts, it can block the natural drainage of fluid within the eye. This blockage causes a rapid, painful buildup of pressure called glaucoma, which can lead to permanent blindness if left untreated.
Augen · Passing: Clear or Carrier
These levels are a comparison framework, not an official certification. They help compare breeding programs at a glance.
What to ask when visiting the breeder
A complete checklist with every mandatory and recommended test plus identity and rearing questions — take it with you.
For breeders
For breeders: Welsh Terrier breeding suitability
Machine-readable mating rules, minimum ages, scoring schemes, and what's required for HonestDog verification — as a printable guide.
Example rule — Hip dysplasia (HD-FCI)
Both parents must be tested for Hip dysplasia (HD-FCI) and show a passing result.
How HonestDog verifies
We compile mandatory tests from official breed regulations and veterinary databases — and check every uploaded certificate for authenticity.
Three-tier model
L1 = mandatory under breed-club regulations. L2 = recommended or clinically indicated. L3 = lower prevalence. Every assignment carries a source and confidence rating.
Sources
VDH-Zuchtordnungen, CIDD (University of PEI), OMIA (University of Sydney), curated veterinary input.
Document review
Uploaded certificates are AI-extracted and reviewed by our team for authenticity, date, and result.
Frequently asked questions about Welsh Terrier health
0 tests are currently mandatory under the relevant breed-club regulations. The most common are —. Every test must be completed before mating, and the result must fall within the threshold defined by the regulation.
Verified Welsh Terrier breeders on HonestDog
See breeders who have already uploaded their mandatory tests for verification.