I hate to keep beating a dead horse (or dog as the case may be), but no evolution has occurred from wolf to toy poodle.
There's two ways I could read your comment, John. Do you mean that there's no evolution in that there's not a new species, or are you saying that from wolf to poodle is a step (or many steps) backward?
If the first, I agree with you.
If the second, I think you have a wrong handle on evolution. Evolution is not necessarily "forward" or for the better in some cosmic sense. It's change. Under Darwinian thought, it's change which makes the involved stream of life more able to survive and multiply in the conditions it faces. The move to toy poodle doesn't make those dogs more able to survive in the wild or in some abstract sense, true, but it makes it possible for the involved dogs to survive in a particular environmental niche, namely some dog fanciers' homes.
A newly changed or mutated life form (maybe new species, maybe not) may indeed have painted itself into a corner, so to speak, so that subsequent changes are now fatal to what had been a viable life form under previous conditions. But that's part of the evolutionary process too.