Which passage from the article best supports the idea that one animal species can help another?
Dog owners know that peppy pooches will try to scare off any wild creature they see.
Dogs have smelling powers many times that of humans, which lets them smell the world in ways we can only imagine. One breed…has been jokingly described as "a nose with a dog attached."
The group has even trained a dog to find the caterpillars of the Oregon silverspot butterfly…. Such research can help wildlife officials improve protections for endangered animals.
You may have heard of Lassie, a collie of classic TV fame that always comes to the rescue.