The Border Terrier once called the Coquetdale Terrier, developed around the Cheviot Hill in the northern border of England. These dogs were desired by farmers because they could go to the ground while going after a fox, rabbit or rodent and they can keep up with the speed of a horse during a chase. Native food supplies would have been fox, rabbits, and rodents, with wheat and ground vegetation.
When feeding your border terrier we would recommend horse meat, wheat, yellow corn and most of your carbohydrates coming from potatoes.
You should avoid soy, poultry, white fish, rice and beets.