|A sheltie and a collie|
The first time a rough collie was in a dog show was in 1860. The AKC recognized the breed in 1885. The Collie Club of America, which started in 1886, is one of the very oldest breed clubs in the U.S.
(3) Blue merle
Mom knows a rough collie named Cabernet, whose mom is on the Humane Society board. Cabernet is a tri-colored collie. She and her mom like to go to Children's Mercy Hospital to try to make the sick kids feel better. I think they must be very good at this. Cabernet is very calm and friendly and not spooked by all the scary stuff in a hospital, like I would be. And this is why she is a therapy dog and I am not!