Starting a new thread because Pete's questions to Chad do raise a good topic.
I've been thinking about the whole frequency issue for a while in terms of what a PPD needs. My current dog hasnt had a serious bite since the fall and there's nothing that leads me to believe that he would perform any different regardless of if he even got another one again. With him turning 6 years old on Monday the chance of a training injury increases significantly so for me I'm weighing out the odds of doing it at all together again with him unless I know the decoy personally. I keep him in great shape still but rottweilers being rottweilers his joints prob only have one or two good years left in them-three if I am extremely lucky. None the less I consider him ready for action. Sometimes you just know your dog that well-in six years he has never been broken or shown a sign of not being nuts about engaging in every scenario he has been through so the point of more scenarios is just that and to prove nothing but what I already know.
Reason I say this is that if George St. Pierre got in a fight today after retiring from UFC three years ago would he be any less dangerous or ready to fight someone? I think not. Guy is still in great shape and there's not any chance of him forgetting how to engage someone and lay a beating on them.
Dogs are the same and in a way simpler as they have one method of attack (biting).
Once a dog has been brought up and readied he/she will be that way for the rest of its life. Think a retired PSD would not bite someone if they were permitted? I wouldnt take my chances.:)