I have a 4 year old lab, but don't know of any particular lab forums. Your mom still might be able to get some useful info here on Boxerworld. At 1 year old, her lab is still very much a puppy.
My lab was VERY difficult. He was my first dog as an adult, and was an absolute terror to raise. Even now at 4 years old, he is still a little devil if he doesn't get enough exercise. He was very destructive for the first few years. However, he has grown to be such a wonderful dog that those terrible first few years were certainly worth it!
I'm not sure what problems she is having with her, but if she is being destructive, it is surely a sign that she needs more exercise and mental stimulation. The best thing that helped us get through my lab's first few years was doggie daycare. We wouldn't have survived without it. My lab needed SO much more exercise than my boxer did during the first years.
Let me know if I can be of any help! I'm no expert, but have certainly lived through raising a very difficult lab. The first few years can be extremely tough, but I would (and will) do it again in a heartbeat to get a lab like I have now!!!