any breed can guard, or protect. But most of the time when they act that way it is out of fear for themselves. Not all labs are as friendly as you think, just like not all pitbulls and rottweilers are horrible beasts. You can not generalize. You must work on his situation before it escalates to far. Work on the out command. Teach him there is nothing to fear. Do not baby him, it will become alot worse
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