Although more research on the subject is needed, these studies show dogs were already a separate species when they first encountered humans. One thing is certain, dogs have been part of our lives and helping us for many many millennia. And not only have we helped them, but they have helped us by performing a variety of tasks, according to NPR. Dogs have been loyal hunting companions to early humans and are still loyal today, performing tasks like helping those with disabilities to sniffing out cancer in humans. They even help lift our spirits by helping those with depression.
