Border Collies
Border Collies have become an integral part of cattle management at That’ll Do Ranch; from moving cows across pastures, through corrals and up alleys, we could never have been as efficient as with a trained border collie at heel.

The Border Collie is a working and herding dog breed developed in the English-Scottish border region for herding livestock, especially sheep. It was specifically bred for intelligence and obedience. Wikipedia
  • Lifespan: 12 y on average
  • Temperament: Alert, Energetic, Tenacious, Responsive, Intelligent
  • Mass: 12 – 19 kg (Adult, Female), 14 – 20 kg (Adult, Male)
  • Height: 48 – 56 cm (At the withers, Male, Adult), 46 – 53 cm (At the withers, Adult, Female)
  • Origin: Scotland, Wales, Ireland, England, United Kingdom
What is a Border Collie?
Border Collies are the fanatical black and white dogs that have been bred to herd sheep. They come in an assortment of sizes and colors, though they generally range from about 30 to 60 pounds and their "typical" markings are black with a white collar, chest, head stripe (blaze), paws, and tail tip. These markings are only the perceived "typical" markings, as Border Collies also come in red/white, black/red/white ("tri"s), blue merle, red merle, mostly white, tan and black, brindle, sable, and mostly black varieties. They are quite commonly seen in television ads and Hollywood films (the dogs in the movie "Babe", for example, were Border Collies). They are known for their incredible herding instinct and their keen intelligence.

What exactly is "herding instinct"?
The herding instinct in Border Collies is a behavioral trait that has been bred "into them" over the past two hundred years or so. What many people fail to realize, even long-standing Border Collie owners, is that the herding instinct is simply a modified version of the killing instinct of wolves. The instinct has been toned down somewhat through selective breeding. In fact, the instinct has not been bred "into them" but rather, "out of them". Border Collies retain the circling and gathering instinct so vital in hunting wolf packs but refrain from actually going in and making the final "kill". 
The instinct to herd in Border Collies evidences itself differently than in most other herding dogs. Whereas most breeds of herding dogs drive the livestock away from the handler, Border Collies circle the livestock at the far end and bring them back to the handler (known as "gathering" or "fetching"). Additionally, Border Collies tend not to use force (initially) to drive the livestock where they want to but rather, use what is known as "eye", a sort of threatening stare-down that intimidates the stock into moving in the desired direction. If the non-physical means of moving stock do not work, a Border Collie's natural instinct is to slowly escalate the encounter into an ever-increasing use of force.