Myopathy) is something that no breeder would like
to have happen in their puppies and something that you can eliminate via an
easy dna test. If a breeder breeds a carrier to a carrier, puppies with CNM
can be produced. It just takes testing your breeding dogs to be sure you
never produce this problem. Breeders should be testing their dogs.
Originally called Labrador Muscular Myopathy or Hereditary Myopathy of the
Labrador Retriever (HMLR) due to it being breed specific to labradors. It is
a hereditary disease where the muscles of the Labrador do not develop
properly. Affected pups are obvious by the time they are between three and
six months of age. The pup will begin to stumble and fall when trying to
walk. There are difficulties in swallowing since the muscles in the
esophagus are often affected. There is no cure for the disease. CNM
is a simple autosomal recessive. Please go to
www.labradorcnm.com and look at the
Genetics link in the left menu for charts on breeding. Consider the charts
before planning a breeding.
This dog in the video to the left is NOT our dog.
To the left is a video that shows the outcome of an affected dog.
The lab in the video below is not our dog. This was a video from
youtube that gave an example so viewers could see what the syndrome
We have tested our Labrador Retrievers that
parent our litters. Both Nina and
Goldie tested clear!
Diagnosing CNM Affected, Carrier, and
Clean Labrador Retrievers.
The CNM DNA test, available at
www.labradorcnm.com, is highly reliable in identifying the disease. It
can determine affected, carriers, and clean CNM Labradors. It is
inexpensive and involves a non-painful collection of cells from the inside
of the canine’s cheek. The owner can easily do the test themselves, or can
choose to go to a veterinarian. The CNM Project provides kits and e-forms
with very specific easy directions. The only other way to determine if a
parent in a Labrador litter is a known carrier would be if an affected pup
had been produced. At one time biopsies were also used, but these have been
abandoned as a method since they do not identify carriers and are expensive