While 50 generations is double than what was previously discussed, I still don't think it's that much of a difference. Domestication cannot occur over 25, 50, 100, 200 generations. It looks like the dog was domesticated over the span of 1000s of years (and this experiment has only been in place a couple of decades at most?).
Actually, in my behavior course this past semester, we discussed Coppinger's theory of domestication, which suggests that dogs self-domesticated from wolves, but the theory also suggests that "domestication" could have occurred in as little as 10 years. Just food for thought.
I also understand the value of responsible breeders who are committed to preserving and improving the health of certain breeds (and by responsible I mean they will take back any dog they have bred at any time). But the fact is that most breeders do not provide this kind of guarantee and most people do not need a purebred dog to fulfill their needs...and even if they do they can look into a breed rescue.
Agreed. We breed our dogs (who are also show dogs), working with a breeder. The breeder we work with, as well as the other breeders I have met through her, are fantastic in terms of their policies. ALL of their dogs are hip, heart, and eye certified at Cornell and/or UPenn. They have spayed or neutered dogs that showed health/behavior problems, regardless of loss of money. And all of their contracts state that if for some reason, the owner wants to surrender the dog, the dog MUST be returned to the breeder, not a shelter. They have taken back dogs at all ages.
A friend of a friend contacted us because she'd just bought two purebred golden puppies from a breeder. Her 7-year-old lab was not adjusting, she didn't have a fence, the puppies weren't housebreaking, etc etc etc. Our breeder immediately homed the two puppies without question or payment. These were not her dogs, but she did it anyway.
I totally agree that there are issues with breeding animals when we have such overpopulation issues, and before anyone says it, I will agree that the breeders I work with are likely the minority. But it is naive to think that there will ever be a time when there aren't people who want a purebred puppy and not a shelter dog. Because of that demand, it is so important to support GOOD breeders (while simultaneously shining light on backyard breeders and puppy mills). If we can breed good, healthy, purebred lines and minimize (or completely eliminate) puppy mills, then that's a success for animal welfare.
Of course, I strongly advocate educating the public about shelter animals, and I plan to adopt my own personal pets in the future. But I think it's unfair to put ALL breeders and purebred animals in a negative light.