Your two references (bird/dinosaur & horse) while a good start, in no way even scratches the surface. I do not claim to be a scientist, I can claim though that I am an observationist and in my observations I have seen a great multitude to species around the world. If they all evolved from a one or even a few organisms don't you think that there would be more evidence of this macro-evolution brought up earlier. I am straddling the fence here trying to see where the stronger argument lies and at this point you haven't begun tipping the scale, though you think your proof in infallible.

The man that hath no music in himself, Nor is not moved with concord of sweet sounds, Is fit for treasons, stratagems and spoils. -- William Shakespeare