Speciation does not, DOES NOT occur as the result of bottlenecks, artificial or otherwise. No one and I MEAN NO ONE has demonstrated this to be the case.
A breeder (a Homo sapien that likes dogs and breeding them for novel traits, fun or profit) discovers a novel mutation in a pup that the breeder sees some value in. Subsequent to maturation, the breeder breeds this dog to perpetuate and select for the trait the breeder likes. Selection. I repeat SELECTION. Not a bottleneck. There is no evidence that the selection reduces the population of dogs, a particular breed of dog or massively reduces the genetic variation of dogs or a particular breed.
I believe you are looking at this from a poor perspective. Every dog the breeder excludes from mating might as well be dead or never born for the purposes of his 'experiment". He is selecting one or two dogs with the traits he desires and these characteristics are quite often related to behavior. If he selected four dogs or six dogs this is no different than a natural bottleneck until such time as the off spring are bred back into the population.
I never suggested that every bottleneck results in speciation. If you select 100 random humans to breed they would never in a million tries create a new species. I am saying that when nature creates a bottleneck it is NOT IN ANY WAY RANDOM in most instances and in NO instances when speciation occurs. I am saying that when nature selects for quirky individuals these individuals are share genes that caused the unusual behavior and it's these genes that result in speciation.
If humans had selected wolves that were funny colors they wouldn't have gotten dogs. they'd have simply created funny colored wolves. But tameness is highly uncharacteristic for wolves so when humans selected "tame wolves" they got "dogs" which for all practical purposes are just tame wolves. By the same token whales are probably just a predecessor species and descended from the few four legged version that liked water. By some means water saved the lives of these individuals who created whales.
I believe most speciation is quite sudden and caused by a few unusual individuals who survive because of their behavior. Obviously there is also mutation and other forces but what doesn't really exist is gradualism caused by survival of the fittest. Yes, there are some highly stable niches that could produce a gradual change under highly unusual conditions but this is not the mechanism for change in species. This is because every individual is equally fit and when conditions change suddenly some will fare better than others but since individuals are equally fit there is no substantial change in the nature of the species.
We have a warped perspective because we don't look at life as consciousness and we don't look at life as individual. "Origin of Species" has no meaning because we do not understand how life originated and there's no such thing as "species". Of course Darwin got everything backward since he looked at the problem under a telescope instead of a microscope. He approached the problem from the back end of a horse hitched to a wagon in front.
It is IMPOSSIBLE to understand "species" without understanding even one single individual of any kind or make. This is why ancient people understood change in species and used the theory to invent agriculture and domesticate animals. Then they invented the means by which humans are best bred and this got confused into religion. You know killing, stealing, and chasing the neighbors for sexual gratification is a sure fire means to ruin the commonweal and future generations. It is a way to devolve into chaos just as we are doing today largely caused by the belief in science which is highly misplaced. "Science" is a method to learn about ourselves and nature. It is not at all suitable to live by. People who understand science do not use it in this way and do not put their trust in Peers or theory. People who understand science know that there are no conclusions and that it is always a work in progress. They know theory derives from experiment and experiment is no way to live. Each man has to find his own way and is well advised to turn to the philosophers or others (including religious individuals) who have put thought into such questions.
We are so confused because Darwin did not employ science. He thought he could solve change in species through observation alone. He couldn't have been more wrong.