I still remember how I got surprised the first time I saw a pack of dogs (or a dozen),all of them walked by only one man who, however, did not seem to be overwhelmed by the situation and was walking quickly on the street. It happened in mi first trip to Buenos Aires. I believed that I must have found an eccentric man but I could only get more surprised when I saw the second one some minutes later. Actually, it was what they call here a dog walker.
A job like any other, from early in the morning till dusk, he wanders with his pack of dogs around the neighborhood picking up the dogs one by one from their homes. He rings the bell of the entry-phone of each building to announce his arrival to the “dog owner”. She goes down immediately with the dog on lead, hands it to the dog walker who picks it up with a determined, skilled gesture, almost “with a professional gesture”. So he ties this new lead to some sort of hook he has on his belt.