Meanings for border. extend on all sides of simultaneously; encircle. enclose in or as if in a frame. lie adjacent to another or share a boundary. A War-action film directed by J. P. Dutta was released in 1997. have a common border. Show more Meanings. 7. Traumatic events. Traumatic occurrences are widespread in dogs, and one of the most common reasons of aggressive behavior in border collie is traumatic incidents. Rescue dogs suffer from anxiety or post-traumatic stress disorder as a result of previous trauma, so if you will adopt a border collie, check its history. border collie: [noun] any of a breed of medium-sized sheepdogs of British origin noted for their herding abilities. Border Collie Aggression Trigger 4: Lack of Socialization. Socialization plays a crucial role in shaping a Border Collie’s behavior and temperament. When a Border Collie does not receive proper socialization during their formative months, it can lead to aggression issues later on. Border collie definition: 1. a type of medium-sized, black or brown and white dog, known for its speed and intelligence…. Learn more. As an experienced Border Collie owner and amateur trainer, beyond these well-known traits, I can’t say that I absolutely agree with the many generalities made about the breed. I’ve heard experts qualify potential owners by saying that “unless you have a large yard for Borders to run, you shouldn’t own one.”. Sometimes true, but Smart dog: Border collie learns language, grammar. SPARTANBURG, S.C. — The experiment began with a racquetball that has now been replaced many times. "Chaser! This is Blue," said John Pilley, a Basic border collie facts. According to the American Kennel Club, border collies usually weigh 30 to 55 pounds and live 12 to 15 years. They can have rough or smooth coats, and will require brushing a couple of times a week—daily when they’re shedding. Border collies’ coats come in a wide array of colors and patterns. Adcy.