I'm just wondering if anyone has any advice for me. I have a large lab mix dog that is one and a half. Ever since he has been very young he has been aggressive toward children (young boys in particular). I had him neutered when he was about 9 months old, but it has not changed his personality in that aspect. He has never biten anyone, but he will run up to them and start barking a very deep bark and his hair on his back stands up and he kinda lunges forward at them. What should I do?

If I were you? I would make sure I have PLENTY of homeowners insurance, because it sounds like the day will come when the dog does bite a young boy....

I would consult an animal behaviorist; I agree with the previous poster that right now it sounds like the dog would bite a child with even a little provocation... I am sure a behaviorist would be able to help, they sometimes give free advice over the phone.  Once, my cat was continuously "going" outside of the box and I called a behaviorist: for free, she gave me some advice that worked immediately and I have not had the same problem since... I am thinking that the behavior that your dog is exhibiting may take a little more work than that, but definitely call.

Please, please be careful.  Kids and dogs are unpredictable!!  See a reputable trainer/behaviorist.  Never leave the kids and dog unsupervisied.  You need to protect your kids first, and then protect your dog from the kids.