I agree with hbp, take your time and do it right.I believe in properly introducing your dog to the gun as well as the environment. Natural instinct won't kick in till about two years old,give or take. You want to take the time and adjust his or her instinct to suit your style.
It is true they're born with it but sometimes you have to pull it out of them. Just my 2cents, good luck to ya.
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People for the Eating of Tasty Animals.