This is one of the things that drives me crazy! So many people out there can't be bothered to teach their dog not to pull on a leash (or maybe they don't know how). ARGH!!
Yesterday, I saw a lady with someone I could only assume was her 10 year old daughter walking a young yellow lab (dog looked about 1.5-2 yrs). They were walking along a very busy road. The daughter had ahold of the 6 ft leash - not the adult. (From the looks of it, the adult's hands were empty.) The dog was pulling for most of the walk that I saw and the daughter was obviously struggling.
This is something I see all the time and it is SO dangerous! Each and every dog I foster is taught how to walk on a loose leash before I will consider adopting them out because it is so very important.
What do you think would have happened had the dog run out onto the road?
How about the following scanario ...
The dog sees a cat/squirrel/other dog on the other side of the road. Dog runs out and across the road. Daughter has the leash looped around her wrist and can't let go fast enough. Daughter is dragged out in front of cars. Car in near side of road is able to stop in time (whew!) but truck on other side of road has heavy load and needs extra room to down-shift and stop (yikes!). Dog and Daughter are hit by truck. SPLAT! That is one big mess to clean up.
All for the sake of a bit of training.