Well, I threaten them, beat them and pin them to the spot. The truth is a little worrying. I do teach wait, but for 5 of them it's done for food. As I say - "I pay them!" Ross won't drop his kong to eat the treat, as soon as the photo is taken he grabs it and waits for the others to run off with him ... Zeus only gets a "release word," which is usually Ok, or sometimes "Great Job!" (Don't ask!)