Both Blaze's sire and dam tested Clear for Fanconi.
Is there any reason then that I should then test Blaze? I certainly have no problem with ordering the test and taking the cheek swab, but just wondered if it was necessary.
First of all for reseach purposes you should, the more data we have the more that can be learned.
Until the direct gene is found, it is recommended that you test because there is no accepted "clear by parentage".