I disagree. We have bred dogs for intelligence, for temperament, for digging skills, for size (big and small), for color (light and dark), for hair (short and long), and many other traits. The result has included traits that never existed in dogs' ancestors,
SIMPLY NOT TRUE - CITE ONE - AND how was it introduced?
the wolves, including a range of sizes and colors and shapes and temperaments totally outside of what wolves produce.
To say we're really "breeding OUT" traits when we breed the most intelligent animals and end up with animals smarter than any of their ancestors, is silly.
And, of course, there's the simple fact in evolution that we know broadly what creatures came from what, and how the observed traits could have arisen and been selected for. Trying to say it's impossible, when in fact it's not only possible but actually happened, is also silly.