[SusanLynn]

Yes, I agree with Kelly. Definitely bring in a qualified trainer or behaviorist to assess your dog. This thread has advice on how to seek one:

http://www.dogforum.com/training-be...ainer-behavior-consultant-behaviorist-113946/

Two more threads I'd like to recommend are:

http://www.dogforum.com/training-be...guarding-causes-prevention-modification-7511/

http://www.dogforum.com/general-dog-discussion/safety-children-babies-dogs-115969/

Please feel free to ask additional questions. Good luck!