I have a huge male black lab 120lbs and 3 years old . He is a great dog not near water. He walks around the day care kids and doesnt even bump them over, he lays down and lets them crawl all over him. but when he gets to a crick pond or river he is absolutly crazy! he fetches until he can barly swim no more and then digs in the sand then goes for a swim by him self i do not throw the dummy for him. if you make a gun noise with your mouth or a mallard call he runs to the boat or truck and barks. any buddy no what could mello him down? i have tried a bark collar and shock collar but it does not seem to work. please help!

Sounds like he is just fired up about hunting.

Did you do any obedience or training w/ him as a puppy?
Does he sit still and quiet when hunting?
Does he retrieve your birds?

120 lbs, you might try a 2x4...................

i trained him when he was a pup to fetch the second day i got him and kept up with it until now. he nos how to sit and stay his directions in the field and to laydown ext. he sits still in the boat after we get done throwing out decoys but barks some. he retrieves my birds great! he found 1 that dove under water in the weeds and will never give up on a bird untill he finds it.

poker i have tried an oar!

Obedience is more than sitting sometimes and staying sometimes. I have a male w/ an extremely hard head and it took a few ass-whippings that I was almost ashamed of to get his attention. He will listen to me now.
If he sits and hunts and doesn't disrupt or flare birds and brings back what you shoot...what else do you want him to do?
If he is barking while you are hunting or working birds you may need to try a little attention getting.
An obedience class for you and your dog may get you all you need. Controlled energy & enthusiasm is what makes great dogs.
Good luck!

thanks!