[Storm]

Because all the "juices" are flowing this adds to the reluctance to AUS. Presumably he knows what aus is! Do it in an instant where the dog is not in "high drive", and away from the presence of the helper, and check the reaction. It should be cleaner with less resistance. The dog must learn that the Aus does not mean he loses his "prize" but that the aus leads to greater and better things. Should he also be a little "highly strung" this will also lead to reluctance on behalf of the dog to aus as the bite is a way of him letting out all his "frustration"/ energies etc. He worked for it now it's MINE, type of thing. Is the out done while on the helper or once he has a sleeve and you out him. Get your helper to try and form an association that quick out leads to new bite, try two sleeves, once he gets a bite, re-agitate with other sleeve as soon as he drops it, AUS must be accompanied. Also is the dog put under pressure? Try doing relaxing exercises accompanied with an aus in conjunction with re-agitation and another bite. Try reward the aus, initially, quickly to let the dog realize that quick aus brings about next bite, reward, etc. This way the helper forms the association and you avoid possible conflict between you and your dog.;)