Hi,
This is Paula, I have a chocolate lab Louie who just turned 2 and I have never had any problems with him with food aggression. I can take anything out of his mouth including any bones. He has eaten with other dogs, I give him cookies around other dogs etc. A couple of weeks ago we were at my parents for a cookout and eating on the deck and it had been a long day and he hadn't eaten yet and I handed him a little piece of chicken a couple times (I know I prob shouldnt have done that and don't often) and my mothers little pekingese walked over and Louie growled and went after him. I couldn't believe it once he had never done that. I grabbed him by the collar, thankfully he didn't bite him it was just loud. So I made him go lay out in the yard while we finished and he is trained so he stayed there. A week later we had a cookout. While we ate I again made him lay in yard while we ate and everything was fine. Yesterday we were by the pool all day dogs playing together all day. We were sitting on deck before left not eating and I gave Louie a cookie. 5 min later my mothers dog came over Louie was just laying there and he grumbled at him. He just left nothing happened. He has never done this anywhere else should I be concerned and what should I do. Sorry so long but wanted to explain it all