When the test was released, my husband said that we would never really get to see the real numbers of carriers and affecteds because there would be many who would not test their high risk dogs because they would not want the results out there for everyone to see. I think that we are seeing this, some breeders are afraid to see what their results will be.
There has been a Code of Silence very much in effect in certain countries, I have personally recieved nasty emails from people in other countries when discussion on lists over the years has turned to Fanconi and I just happened to mention statistics like Dr Gonto has consulted with Basenji owners dealing with Fanconi on every continent. Nearly 10 years ago, a basenji breeder in Australian sent me an incredibly rude email asking me to retract that statement because she was 100% certain that there has never and will never be Fanconi in Australia.
This Code of Silence has prevented breeders from collecting good data and making educated breeding decisions. There have been many breeders who have tested expecting to find all Clear results only to be crushed when well over 50% of their kennels were Carrier or Affected. These results are what some of these other breeders are using as their "proof" the test must be wrong. They are so entrenched in the belief that Fanconi can't happen to them they do not want to find out that they are wrong.
The one thing we can do is to make sure that the correct information about the test is put out there for each buyer to make their own decision. We should encourage owners of dogs with untested parents to test so that they have an idea of what to expect. We should be sure to ask that anyone who is considering a basenji, be sure to only buy from a breeder who not only tested but used those test results to make responsible breeding decisions. I have seen at least two breedings where there was not a parent that had tested Clear. In one case, only one parent was tested and was a Carrier. In the other case, both parents have tested Indeterminate. This is not responsible breeding. Nor is continuing to breed blind when a test is available.