Let me say again, I don't think you're understanding what evolution is. Mastiffs and chihuahuas are bred by selectively BREEDING OUT unwanted characteristics. BREEDING OUT, that is, REDUCING a gene pool, will not get you from bacteria to baboons, or from worms to woodpeckers. You can only do this by selecting and applying NEW information.
Most non evolutionists (including most creationists) ACCEPT the idea of "change over time," (how else could you have the divergence of the human race(s)?), but they DON'T accept addition of complexity over time. Seen through this matrix, the great majority of "examples of evolution" break down (ie, eohippus-->horse: the sequence of toes 5-4-3 and down to 1 toe is a reduction, a degradation) though it may be advantageous to a horse, it is NOT a more complex form.