Health Group Report 2021
The COMMD1 DNA test is NOT definitive and the results are  frequently misrepresented.  The results only relate to the COMMD1 form of CT.  It is incorrect to declare a dog 'clear' of CT.  A number of dogs with COMMD1 results 'clear' and 'carrier' has been diagnosed affected with CT when a liver biopsy was carried and the sample analysed by an experienced veterinary pathologist.                                                                                                  
This year some more dogs affected with Copper Toxicosis but COMMD1 tested Clear and Carrier have been identified.  The Research Project currently being carried out by Dr Susan Haywood, Prof. Mike Herrtage & Penny Watson, University of Cambridge Veterinary School and June Swinburne, Animal DND Diagnostic Centre is now going through the assessment process and should be published in the near future
They have also been looking at CT in dogs from a number of other breeds identifying a number of potential causative genes.
They still need liver and blood samples from any dog which is suspected of having CT.  Another way you can help is to supply an Autopsy sample.                                
Some people put dogs onto low copper diets on the basis of the COMMD1 DNA results, this should only be done with the consent of a vet.  I have seen some incorrect information on CT on  puppy sales websites so please beware.  If you want accurate information contact one of the three KC breed clubs websites.
Sheila Baldwin
     Bedlington Terrier Health Group - Coordinator