Bests & Worsts Reviews from Amazon

I actually used this as a second test for my Heinz 57 pup. The first test came back with results of 5 breeds that did not appear to match her looks or personality. Even though we read that testing is 99% accurate, my question is, how do you know unless you test again. So this was my second test. Results came back with a mix of breeds only one breed matched the first results. So now, do we believe the first or the second test results?