She is a 3 year old shep mix that we got from a rescue, who had gotten her from a bad situation. evidentally she lived on the streets and some men used her for breeding with their pitbulls. the foster mom told me she was initially scared of men but that she was over it now. the dog has been perfect and gentle with everyone she has met, men and women alike, until Sunday afternoon. she was leashed sitting on the porch with me and a neighbor when another neighbor came across the street to talk and my dog lunged and bit him in the leg! I am so horrified and ashamed I can barely stand it, I feel like a terrible dog owner already. I have every intention of taking her to training classes (she currently can't leave the house- under quarantine) but my question is this: can this dog be helped or will she continue to bite? thanks for reading my first rambling post and thanks in advance for any advice.