This is one of my greatest faults as a trainer. In more difficult or new situations in training, I often do well with remaining calm, teaching the dog, and encouraging success. However, I find a hard time backing up and simplifying into a "gimme" scenario when he starts screwing up something he knows EXACTLY how to do. For instance, I might only have time for or conditions might warrant a short session. Lets do a little wagon wheel/baseball work to keep it sharp. Easy peazy, we've done it countless times. Then all of a sudden one day that sucker will take an over cast and banana peel it to the back bumper REPEATEDLY. At that point I know that throwing a new bumper to the over pile would make him take the over. I also know that's just reinforcing his selfish desire to pick up the bumper he wants to (the new one, the exciting one). With the same bumpers out I'll sit him again and give a strong OVER then boom, banana peel to the back bumper. I'll then proceed to lose my cool. Where do you guys draw the line between holding your dog to a standard he knows EXACTLY how to meet and simplifying the drill into a "gimme"? He wanted that back bumper because it was the last one thrown. Throwing to over and casting over solves nothing other than giving him what he wanted. He knows to go where I cast him and not just a release for where he wants to go. Do ya'll go to the gimme, or push the dog until he does it correctly? (When he has already been taught, and knows it all too well).