Dune's DNA Tests
Dune's copper test result is the best a Labrador can get although I believe copper toxicity is much more related to environment in the Labrador. The test was included as part of the panel. The copper test has two parts. "B" is the BAD part and he is Clear and "A" is the Good part and he carries that.
So, Dune is Black carrying yellow and Non Dilute. Some of these tests are probably not even Labrador necessary. Important thing is he is clear.