Introduce them to squirrels and let instinct do the rest. Border Collie Alamy. 4. Border Collie The border collie is considered the most intelligent of all dog breeds, but this brilliance sometimes ...

Dotzie, a mountain cur, trees a fox squirrel near Zenith, West Virginia. Photo by Larry Case Squirrel hunting behind dogs has taken a big jump in popularity in the past few years. Unless you are ...