How old is the puppy? I wouldn't characterize him or give up on him too soon. I don't disagree with you that dogs, like humans, have some ingrained or genetic behavioral traits that they'll always carry but I've seen a couple of wimpy pups that changed a lot with training, encouragement and maturity. They both ended up with a desire to hunt in any conditions.
The OP never replied to this but it would certainly help with answering the question.
A little OT - I was reading a touchy-feely story today about the millions of dogs who would be boarded on July 4th because they're scared of fireworks & I kind of chuckled. I have to lock mine up because he thinks people are shooting & wants to go over there. I took him to the local skeet range when he was a pup to test his shyness & had to get him out of there before he dragged me on the range.
