I'm not sure that was many moons ago. After their brief racing career, they would adopt the dogs out. You could do it through the track.
We use to camp and one weekend my wife and I left the camp to attend a baseball tourney with my son. Our Daughter who was around 8 at the time asked if she could stay behind with her friend. We had a seasonal campsite and were well familiar with everyone who camped there so we had no problem letting her stay. We get a call later in the day that our daughter was hurt but was looked at by a Paramedic who camped there and they told us don't rush back, he cleaned her up and it was no big deal she was just scrapped up a bit. When we got back later in the day I was shocked when we saw the extent to which she was injured. She weighed all of about 50 pounds at the time and was walking her friends Golden Retriever which outweighed her by about 10lbs or so. They were having firetruck rides for the kids in the campground and when the firetruck passed it put on the siren and spooked the dog. The leash was wrapped around her wrist because she was concerned the dog would get away from her and didn't want that to happen while it was on her watch. We'll the dog took off running and dragged her for almost a quarter mile through the gravel as it was running back to its campsite. People were chasing the dog but it probably just made the dog more determined not to get caught. She couldn't let go of the leash and wasn't strong enough to stop the dog as it outweighed her. She spun continuously for the duration. We took her immediately to the local hospital emergency room, they then transported her to a large hospital with a burn trauma unit. She suffered 2nd-degree burns on her chest, rear end, hands, legs (front and back) and both feet. About 30-40% of her body. It literally burned her skin off. They had to put her under just to clean the wounds they were so bad and extensive. Then we had to sign a waiver for the Anesthesiologist due to the concern of sedating her and her low weight, that was really nervewracking but we had no choice. All told she spent about a week in the burn unit. The only thing that saved her face was the height of the dog and shortness of the leash kept her face elevated off the ground. When they put her under and undressed her, I cried like a baby when really I saw how bad it was. I can't imagine the pain she was in. Moral of the story, when the dog outweighs you, don't wrap the leash around your wrist, you'll never get away. She learned the hard way.
