Check out the link below for some info on Wipeout bred hounds. They are very popular in the Coon dog world. The line is known for being accurate locators. I have a buddy that owns a grandson of the Zack dog. He looks just like the triple threat dog in the second picture. He handles like a dream, has a big bawl mouth, trees good, and normally has a Coon in the tree.
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http://forums.ukcdogs.com/showthread.php?threadid=184913