I saw the thread, and thought it was all rather absurd, too.
Like already stated, it doesn't make sense from an evolutionary standpoint. A dog with less nerves in its tail or ears does NOT have a better chance of surviving to adulthood and being more capable or worthy of reproducing. Changes to a species/breed/type and evolution occurs when a certain trait/mutation allows the animal (or organism) to survive long enough and well enough to produce a larger number of off spring with similar traits.
If I have two Rottweiler puppies, one "without a nervous system in the tail" and one with, and dock them both, the one originally without the nervous system in the tail (as the poster put it), is not going to have an much larger chance to survive to be bred, or bred more often than it's counterpart with the nerves in the tail because of this trait.
Like already stated, it doesn't make sense from an evolutionary standpoint. A dog with less nerves in its tail or ears does NOT have a better chance of surviving to adulthood and being more capable or worthy of reproducing. Changes to a species/breed/type and evolution occurs when a certain trait/mutation allows the animal (or organism) to survive long enough and well enough to produce a larger number of off spring with similar traits.
If I have two Rottweiler puppies, one "without a nervous system in the tail" and one with, and dock them both, the one originally without the nervous system in the tail (as the poster put it), is not going to have an much larger chance to survive to be bred, or bred more often than it's counterpart with the nerves in the tail because of this trait.