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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 11 additional clinically recommended screenings that reduce risk in this breed.
In addition to mandatory tests:
Cleft palate
Allgemeine Fitness und Anatomie
A cleft palate is a congenital birth defect where the roof of the mouth fails to fuse properly during development in the womb. This failure leaves an abnormal opening between the oral cavity and the nasal passages. Because these two systems are directly connected, food, liquids, and air cannot be properly separated during swallowing.
Physisch · Passing: CLEAR
Cervical vertebral compressive myelopathy(CVCM)
Bewegungsapparat
Cervical vertebral compressive myelopathy, commonly known as Wobbler syndrome, is a condition affecting the spine where the spinal cord in the neck becomes pinched. This compression is caused by malformed neck vertebrae or slipping discs between the bones. Over time, the constant pressure damages the nerve pathways that carry signals from the brain to the limbs.
Roentgen · Passing: A
Hereditary myopathy - Labrador retriever/Bouviers des Flandres myopathy(CNM)
Bewegungsapparat
This is an inherited muscle disease affecting the skeletal muscles of Labrador Retrievers and Bouviers des Flandres. It is caused by a genetic defect that prevents muscle fibers from developing normally, leading to progressive muscle wasting where the muscles gradually shrink and weaken.
DNA · Passing: CARRIER
Hemophilia
Herz und Kreislauf
Hemophilia is an inherited blood clotting disorder affecting the circulatory system, where the body lacks specific proteins needed for coagulation, which is the process of blood clotting. Because the blood cannot clot properly, even minor injuries can lead to prolonged internal or external bleeding. This condition is inherited through an X-linked genetic trait, meaning it primarily affects male dogs.
Koerperfluessigkeiten · Passing: CLEAR
Diabetes mellitus(DM)
Hormonelles und Stoffwechsel
Diabetes mellitus is a chronic metabolic disorder affecting the endocrine system, specifically the pancreas, which fails to produce enough insulin. Insulin is a vital hormone that allows the body's cells to absorb glucose, or sugar, from the bloodstream to use as energy. Without sufficient insulin, sugar builds up in the blood while the body's cells are starved of fuel.
Koerperfluessigkeiten · Passing: CLEAR
Cerebellar abiotrophy(CA)
Nervensystem
Cerebellar abiotrophy is an inherited neurological disorder affecting the brain, specifically the cerebellum, which regulates balance and movement coordination. In affected dogs, the nerve cells in this region prematurely degenerate and die off. This progressive cell loss disrupts the brain's ability to control smooth physical movements.
DNA · Passing: CLEAR
Degenerative Myelopathy(DM)
Nervensystem
Degenerative Myelopathy is a progressive disease of the spinal cord where the protective sheath around the nerves slowly breaks down. This deterioration disrupts the vital communication signals between the brain and the muscles of the hind limbs. Over time, this lack of signal transmission leads to a complete loss of muscle control in the back legs.
DNA · Passing: CARRIER
Epilepsy(IE)
Nervensystem
Epilepsy is a chronic disorder of the brain and nervous system where abnormal electrical activity causes sudden, temporary disruptions in normal brain function. These disruptions lead to repeated seizures, which are involuntary changes in body movement, sensation, or behavior. Because the underlying cause is often complex, the brain's electrical signaling remains permanently prone to these sudden misfires.
Physisch
Globoid cell leukodystrophy (galactocerebrosidosis)(GCL)
Nervensystem
Globoid cell leukodystrophy is an inherited metabolic disorder affecting the nervous system, caused by a deficiency in an essential enzyme. This deficiency leads to the buildup of harmful substances that destroy myelin, which is the protective sheath surrounding nerve fibers in the brain and spinal cord. Without this protective covering, the nerves cannot transmit signals properly, resulting in progressive neurological decline.
DNA · Passing: CLEAR
Portosystemic hepatic encephalopathy(PSS)
Stoffwechsel
This is a neurological condition caused by liver dysfunction, typically occurring when abnormal blood vessels bypass the liver. Because the liver cannot filter toxins from the bloodstream, these harmful substances build up and directly affect the brain. This lack of proper filtration leads to central nervous system dysfunction.
Passing: NORMAL
Skeletal Dysplasia 2(SD2)
Zähne und Knochen
Skeletal Dysplasia 2 (SD2) is an inherited bone growth disorder affecting the skeletal system. It causes a mild form of disproportionate dwarfism, where the long bones of the legs do not grow to their normal length. The torso and head develop normally, resulting in a slightly uneven body shape.
DNA · Passing: CARRIER
These levels are a comparison framework, not an official certification. They help compare breeding programs at a glance.
A complete checklist with every mandatory and recommended test plus identity and rearing questions — take it with you.
Open the full checklistFor breeders
Machine-readable mating rules, minimum ages, scoring schemes, and what's required for HonestDog verification — as a printable guide.
Example rule — Cataract
Both parents must be CLEAR or better.
We compile mandatory tests from official breed regulations and veterinary databases — and check every uploaded certificate for authenticity.
L1 = mandatory under breed-club regulations. L2 = recommended or clinically indicated. L3 = lower prevalence. Every assignment carries a source and confidence rating.
VDH-Zuchtordnungen, CIDD (University of PEI), OMIA (University of Sydney), curated veterinary input.
Uploaded certificates are AI-extracted and reviewed by our team for authenticity, date, and result.
13 tests are currently mandatory under the relevant breed-club regulations. The most common are DNA-Identitätsnachweis, Zahn- und Bissbewertung, Progressive rod-cone degeneration (PRCD-PRA) (PRA-prcd). Every test must be completed before mating, and the result must fall within the threshold defined by the regulation.
See breeders who have already uploaded their mandatory tests for verification.
View verified breedersHealth Testing Guide
Which tests are mandatory, how to spot responsible breeders — and what it costs when things go wrong.
For the Labrador Retriever we have compiled 13 mandatory and 11 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 Labrador Retriever is a popular family dog, but it carries an above-average genetic burden of potential health issues. In particular, the risk of joint problems such as hip dysplasia (HD), sudden muscle collapse due to Exercise Induced Collapse (EIC), and eye diseases like Progressive Retinal Atrophy (PRA) makes buying a puppy without certified test results from the parents an unpredictable risk.
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.
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.
There's no one-size-fits-all here. For the Labrador Retriever we track 13 mandatory tests plus 11 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.
There are two main types of health tests:
Screen the dog's DNA for known disease-causing mutations. Can be performed from puppyhood and give a binary result (clear / carrier / affected).
Clinical and imaging exams like X-ray, ultrasound, or ophthalmoscopy. They show how a predisposition actually manifests — usually only conclusive after 12–18 months.