I had a dog sitting job in Palm Harbor with two rather large dogs and the owner had them on very long leashes in contraptions like a fishing rod reel. I tried to take them out and within a few minutes they were entangled in the leashes. Nosey neighbors notified the dog owner of my progress as a dog walker and that was a quick end to that gig.
They were beautiful animals but cannot remember the breed. Maybe this one--
Saluki - Wikipedia.
This was a recent widow and the dogs were kind of her everything.