I cue the jackpot by saying "jackpot" and by taking the collar. You will notice in my videos that I touch or grab Maddie's collar before we head to a jackpot. One of the problems, that sometimes will crop up is a dog leaving the ring to go find the jackpot. I teach mine that they cannot have the jackpot until I have their collar so we establish a good pattern having to work with me to unlock access to the jackpot.
Here is Maddie doing some jump work. As you know, she still has about 6 more months before she will be allowed to climb or jump anything of significant height. I want to make sure she is fully mature first. I am pleased that her tunnels are more under control. They sometimes make her crazy. I still block her access if we are not using them since Maddie will still play in them.
Again, you saw me grab Maddie's collar each time. For seasoned dogs like Seven and Riley, they LOVE collar grabs!