It's not just like doing a trick for food - it involves games that get the dog's prey drive into high gear. Today we played a game where I throw a piece of food in one direction, he runs to get it, and then I call him and throw in the opposite direction. Ricky was really moving to get that food. There are other games as well - have him chase me to get the food, hide food around you and have him find it, and a few others.
The cool thing today was Ricky's excitement about the food game lead to a game of where's the bunny! However, Ricky thinks the game is that he finds the bunny, doesn't tug, I snatch it up and say the bunny got away, and he starts looking again. Shelties - they just have to make up their own rules! :)
Chris and Ricky