All you ... PEOPLE who support breed bans: Let's Play FIND THE PIT BULL!!

[baldguy]

136. So, your objection to the DNA testing is based on a CYA disclaimer on a retailers web store?

OOOKAAAY......



And I'll assume you've given up trying to refute the methodology for selecting the dogs? Good.

Let's see what the actual people who conducted the survey say about the DNA testing. Here's another survey from Levy, et al from 2010:

DNA Analysis:

• MARS VETERINARY™, Lincoln, Nebraska, performed the DNA analyses and reported to have “an average accuracy of 84% in first-generation crossbred dogs of known parentage”
• All of the breeds identified by the adoption agencies were in the MARS database
• Breeds must comprise at least 12.5% of the dog’s make-up to be reported Adopting agencies identifications
• All dogs had been identified as mixed breeds at time of adoption
• 16 dogs had been described as a specific breed mix
• 4 dogs were only identified by a “type” (2 “shepherd” mixes and 2 “terrier” mixes)
• 1 dog had been identified by both a specific breed (Chow Chow) and a “type” (terrier)

DNA and Adoption Agency Comparison
• Only 25% (4/16) of the dogs identified by agencies as specified breed mixes were also identified as the same predominant breeds by DNA (3 were only 12.5% of the dogs’ composition)
• No German Shepherd Dog ancestry was reported by DNA in the 2 dogs identified only as “shepherd mixes” by adoption agencies
• In the 3 dogs described as terrier mixes, a terrier breed was only identified by DNA in one dog
• In 15 of the 16 dogs, DNA analyses identified breeds as predominant that were not proposed by the adoption agencies

CONCLUSIONS
• There is little correlation between dog adoption agencies’ identification of probable breed composition with the identification of breeds by DNA analysis
• Further evaluation of the reliability and validity of visual dog breed identification is warranted
• Justification of current public and private polices pertaining to breed specific regulations should be reviewed

http://nationalcanineresearchcouncil.com/uploaded_files/tinymce/Voith%20poster.pdf

And here's a second survey, confirming the results of the first:

The low percentage of agreement between visual and DNA identification may be partially explained by perception biases. However, DNA identification of the proportion of purebred breeds in mixed breed dogs is not perfect either, nor do the laboratories that provide such analyses claim to be infallible. The average accuracy of identification of the breeds in an individual dog can be expected to decrease as the heterogeneity of its ancestors increases. Canine Heritage™ states that their accuracy of identification of known registered purebred dogs is 99%. Wisdom Panel™ currently reports a 90% average accuracy of identification of F1 crosses of known registered purebred dogs.

http://www.animalfarmfoundation.org/files/Transcribed-Interview-with-Dr_-Victoria-Voith.pdf

Reports of DNA analyses of percentages of purebred dog breed ancestry, while accurate most of the time, are not infallible. The laboratories providing such analyses may have qualifiers in their reports stating that there is an 85% or 90% validity of the results and indicate which results have lower confidence levels. Different testing laboratories may report different results depending on which dogs were used to develop their standards and how the laboratories analyze the samples. As the tests are refined, the same laboratory may report slightly different results at different points in time.

http://www.nathanwinograd.com/linked/misbreed.pdf

Over at least three different surveys, the accuracy of DNA tests used is advertized as being up to 99% from the manufacturers, up to 90% observed for F1 crosses, and up to 85% observed for F2 crosses. In the same surveys, the accuracy for visual breed identification of mixed breeds by professional dog experts ranges from 16% to 43%.

So - FOR A THIRD TIME - if you have any actual peer-reviewed data to show that DNA testing is not accurate, show us. now you need to put up or shut up.