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The performance or job description determines the shape and look of the breed (form). The jobs that dogs performed helped humans survive. Humans figured out quickly that if you bred dogs that were good at certain tasks, you would get offspring that were also good at doing them.
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It’s no accident that we have dogs able to hunt, herd, guard, track, and do so many other things at an astounding level. They have made themselves useful in so many ways that we kept feeding them, providing shelter, and breeding them. One of the reasons dogs have been such a successful species is because they are so adaptive. Wherever humans have lived, dogs have lived alongside them performing various tasks. Many have origins dating back hundreds, even thousands, of years. Today, there are more than 400 recognized breeds of dogs in the world. It should come first in the breeder or judge’s final selection, for without type, the breed loses its identity. However, the head is the hallmark of many breeds and is a vital factor in deciding whether such breeds are a good or bad type. The entire dog must be taken into consideration in determining proper type. The Merriam-Webster Dictionary defines “ breed” as a group of usually domesticated animals or plants with identifiable characteristics that distinguish them from other members of their species especially a group that’s characteristics are preserved by controlled mating or propagating.