See the link below, and Shhh.. when the world finds out just how wonderful the BMC's are, they will all want one :-).
http://www.blackmouthcur.com/FAQs.htm#What%20does%20the%20Black
Thanks for the link! My girls are very intelligent and love to hunt, especially tree. Taterbug, the lighter colored one, has the black mouth (on the inside). Mattie, the darker one, is the more aggressive of the two. The mother dog was some kind of hound. She was black and tan but didn’t have long droopy ears. Their dad was full BMC and was a beauty! He had the full black mask across his muzzle. It’s hard to tell in my picture but Mattie is 70lbs and Taterbug is 60 pounds so they are good sized dogs. Taterbug has slightly webbed feet and loves the water. Best watch dogs I have ever had!