Guy's I'd really suggest that you get a few good books on training and learn how to break a pup to guns properly. I've read some hogwash & wivestales here to be sure.
My new pup was broke to shotguns by week 11 and stolling with my skeet squad by the end of week 14 and loving it. He was 18 weeks old at the outset of dove season and now at 24 weeks (6 months for those that can't do math) working on Grouse with 9 mallards ,3 woodies, & bufflehead to his credit between 22-23 weeks.
The only thing I insist on in the first year is to hunt by myself or with only one gun and directing all my energy to handleing the dog. I believe that first season sets the tone for the dog's entire life and don't want distractions to the task at hand for me or the pup.