I have noticed the many stray dogs in our village. There is an ordinance against letting loose the dog in the streets but people just seem not to follow the law. Frequently, we would see dogs mating in the street as we pass by on our way to work. And obviously those dogs will give birth to puppies with unknown breed and those puppies will grow up and mate again. It is like a continuing cycle which degrades the breed according to one breeder we know. He added that it is best to preserve the pure breeds because the character of the dog is greatly affected when it is a mixed breed.