Cur

Cur refers to a dog, usually of mixed ancestry. In common usage, the term is often derogatory. However, Curs are also a category of hunting dog breeds developed in the United States, usually not recognized as show dogs but developed solely for their hunting ability. more...

As a result, most of the cur breeds are types rather than breeds—that is, one of these dogs can be recognized as a certain type of Cur but the appearance standard is extremely flexible, enough so that a complete breed appearance standard is difficult to create. However, several kennel clubs register various cur breeds based on their ancestry (bloodlines), and several lines are recognized within each breed. The United Kennel Club has an active registration program and competition hunting program for these dogs.

Examples of curs include:

• Black Mouth Cur
• Leopard Cur
• Mountain Cur
• Stephens Cur
• Treeing Cur

Read more at Wikipedia.org