I find this article lacking. With such a narrow focus on European bred dogs. European breeding may have started a few hundred years ago (still doubtful, mastiffs were around during the Romans), breeding practices in Asia had existed for awhile.

Also there are many purebred breeds that are quite healthy and not prone to very many illnesses (besides those found in all dogs). Many of the dogs classified as "ancient breeds" are quite relatively healthy. To name 3, Shiba, Akita, and Basenji.