"In the land of the blind, the one-eyed is king."
Popular Spanish saying.
"The ones who can ..... DO."
Popular American saying.
:druid:
By this I mean, to beware of the hype. Don't look .... observe. Don't hear .... listen. Wlak through the smoke screens before making a decision. There are far more trainers without credibility than good ones. Those without credibility (talent) will fill their sites with a lot of hype. Ex: "Master Trainer" titles, and other titles about him(her)self, many trained "Police dogs", "PP Dogs", and other non-provable titles.
When deciding for a trainer, look more at their accomplishments in trials that are not up to him/her. I give more credit to trainer who can produce a CD obedience title in dog than one who has a million trained dogs from uncertifiable means. And you are in an oasis of good trainers. Learn to evaluate objectively and your pocket and time won't be wasted.
On behalf of the dog who bites only when the decoy runs, I can't answer that question responsibly without seeing the dog. It could be myriad of reasons that can be speculated: genetics, raising, training, socialization, handling, etc, etc, etc. I would have to know the age, methods used, time in training, within other things. Hope this helps.