City of the dogs

The dogs have taken over the city of Huaraz, and none of this does anything. You can find mongrels but also plenty of race dogs, some very exotic as greyhounds and pugs :). How is this happening?Families buy a dog for their children.As it is a small sleeping with them, and as he grows up do not want to be spun around the house. Gardens there is not much, and even if they are gates are leaky. They are therefore two choices: on roofs or on the street. When is unfinished house and there is a person who can to clean up, so dog can be on the roof - as above us live rottweiler Tobi. Others live on the streets - there are better nourished, because there will always be some trash next to the poles.
We did not find streets, where there would be no dogs. What will it be for a few years? Perhaps some immigrants come from China? :)