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The same day we had Clover spayed, I asked our veterinary hospital to run genetic tests too. My primary goal was to learn Clover’s MDR1 status (multi-drug sensitivity gene). Depending upon the genetic test you choose, you can also find out your dog’s breed heritage and whether or not your dog tests positive for other kinds of possible disease-causing genetic markers. The good news is that Clover is indeed 100% border collie (cute family tree graphic ahead), and she tested NEGATIVE for all 90 genetic markers. The bad news is that the testing company won’t tell me what all 90 of those markers are, which makes me really crabby.