There is lots of info on several strains of dogs over on the Cur and Feist board of Alton Davis" under the BMC page up at the top in "Pinned" threads if you like reading that sort of stuff.
Yep...lots of good reading over there for those who like history, and want to know true history instead of just what's been marketed.
Have to sign up to view the message board, but here's the link to his site.
http://s1.zetaboards.com/Hunting_With_Cur/index/