Zoe was having some snapping issues not long ago. I have followed the advice on here and also from reading etc. She is doin a whole lot better. When she was playing with my son(he is 20) while we were visiting him she did get rough and bite him and break the skin. I think on his part he maybe got her going a little too much. He did do the exercises for showing he was dominant over her though. Also she jumped a lot and when I moved my foot over the leash to shorten her down so she couldnt jump she lunged up and bit my leg before I could do it.. Didnt break the skin but I felt the pressure of that bite. I held her muzzle for a time and said no bite in a very stern voice. The other thing I noticed is that when she runs around and plays a lot of times the hair on her neck and back raises up a lot now. We were at a yard sale today and it happened to be a lab breeder there and I got talking to her about Zoe. She told me that I have a potential biter and an aggressive dog. She said also that I could have a dog that would initiate dog fights. She said that she shouldnt be trying to grab our hands or pants at all and I better be really tough with her or I will have big problems. Also gave me advice on what to do. I am feeling a little down about it as I always thought of labs as the most gentle breed around and never thought that it could be possible to have this problem. I am now looking into some obedience classes for her as she was too young before. She is 14 weeks old now. If all our training plus obediance doesnt help I am not sure I can keep her. I never wanted a dog I would have to worry about being aggressive . She is very sweet in so many ways and I would have a very difficult time parting with her even with the way she can be.