Oh, where do I begin?
First off, you can't spell hyena, which isn't a canid anyway. Not to mention dingos, poodles, and coyotes may all be the same species anyway, since they're close enough to interbreed. (Don't believe me? Ask an animal control officer on Cape Cod sometimes. Our coyotes are mutts with a decent chunk of wolf in them.)
Now, let's see what we can do with this... okay, dachshunds. Very short legs, slim body, overall a very distorted body plan for a dog. Beagles, normal proportions, but small with big floppy ears. Basset hounds, apparently crossbred with an upholstered ottoman. Poodles, extremely curly and coarse fur, nicely adapted to water conditions (poodle and puddle are, I believe, cognate). Coyotes and wolves, very pointed faces; shar peis and pugs, very short and compact faces. Irish Wolfhound, built like a tractor-trailer; greyhound, built like a solar racer.
The fact that they can all interbreed doesn't gainsay the fact that we're talking about some very different animals here. In any case, there's a bit of borderline speciation here and there anyway -- it really, really wouldn't be a good idea to inseminate a chihuahua with Great Dane sperm, for example. Yes, they're all dogs. It's taxonomy. And it's artificial selection, but natural selection is the same thing without the direction of an intelligent actor.