GAUCHER TESTING

Gaucher testing is a useful genetic tool, but because samples are typically collected on farm rather than independently witnessed by a veterinarian, results rely on correct collection, identification, and handling procedures. Buyers should understand the practical limitations of blot-card sampling and consider DNA results as one part of responsible breeding decisions


Gaucher Testing: What Buyers Should Know
A DNA test is available to identify whether a sheep is:
• Gaucher-free
• a Gaucher carrier
• or affected (two copies of the recessive gene)
This test can be a valuable tool for breeders and buyers. However, buyers should also understand the practical limitations of the current testing system so they can make informed decisions.
This information is provided for general educational purposes only and is not directed at any organization, laboratory, breeder, or individual.

⭐ 1. How the Current Testing System Works
The available Gaucher test is performed by an external DNA laboratory. However, in most cases the samples are collected on-farm by the breeder, rather than by:
• the laboratory
• a veterinarian
• or an independent collector
This means:
• the laboratory receives the submitted sample and paperwork only
• the laboratory does not physically inspect the animal
• the laboratory does not independently verify the animal’s identity
• the laboratory does not supervise the collection process
This is standard practice in many livestock DNA programs and does not mean results are inaccurate.
However, it is important for buyers to understand how the process operates in practice.

⭐ 2. Limitations of Blot-Card Sampling
The current test commonly uses a blood-on-paper collection card. This method is convenient and widely used, but like all biological sampling methods it has practical limitations.
These may include:
• insufficient or excessive blood on the card
• contamination during collection or handling
• incorrect labelling
• heat, moisture, or storage issues affecting sample quality
• failed samples requiring re-testing
The quality and reliability of the result depend on correct collection, handling, storage, and submission procedures.

⭐ 3. Understanding the Scope of DNA Testing
DNA testing is a useful genetic tool, but the result applies to the sample submitted to the laboratory.
Because samples are breeder-collected rather than independently witnessed, the system relies on:
• correct animal identification
• accurate sample collection
• correct labelling
• appropriate handling and storage
• honest submission practices
Like many livestock DNA systems, the current process does not include formal independent chain-of-custody verification linking the sample directly to the animal.
This is not a criticism of laboratories or breeders. It is simply the structure of the current testing model.
The laboratory itself states that liability is generally limited to re-testing where an error has occurred during the laboratory testing process.

⭐ 4. What This Means for Buyers
A Gaucher test result should be viewed as one important tool within responsible breeding programs.
Buyers should understand that:
• a “clear” result means the submitted sample tested clear
• carriers are typically clinically normal animals
• carriers can still be responsibly used in breeding programs with suitable mate selection
• no livestock DNA system can provide absolute certainty without independent verification procedures
Buyers seeking additional assurance may choose to request:
• independently witnessed sampling
• veterinary verification
• or additional documentation

⭐ 5. Our stud

We do participate in Gaucher testing. However, due to the structure of the current testing system and the absence of formal independent chain-of-custody verification procedures, we do not provide test certificates or written guarantees to buyers.
This policy is intended to promote transparency and reduce misunderstandings, particularly given:
• the reliance on breeder-collected samples
• the practical limitations of blot-card sampling
• the scope and limitations of laboratory testing processes
• current laboratory backlogs affecting turnaround times
Due to ongoing laboratory delays, testing availability may be limited during 2026. We will continue to test where possible, however buyers should be aware that results may not always be immediately available.
We encourage buyers to make decisions based on the overall quality of the animal — including structure, temperament, conformation, pedigree, and responsible breeding practices — rather than relying solely on any single genetic test.
​
⭐ 6. Why This Matters
Genetic testing is a valuable advancement in livestock breeding.
​However, responsible use of testing also requires understanding:
• what the test can tell you
• what the test cannot tell you
• how samples are collected
• how results should be interpreted
• how testing fits within broader responsible breeding practices
Educated buyers and transparent breeders help protect:
• buyers
• breeders
• the integrity of the breed
• and animal welfare

Disclaimer This information is provided for educational purposes only and should not be interpreted as a guarantee of genetic status

---