[youtube desc] My parent's dog chasing a treat that she can't catch because it is tied to her collar so she's towing it in a loop. When I was in elementary school I used to do this to our Basset Hound on a regular basis. He would chase a chunk of meat for hours; I'd laugh so hard my stomach hurt from laughing so hard for so long. I tried it on our Golden Retriever; he chased it about ten feet and then turned around and went the other way. Smart dog.