I have a jack Russell cross shitzu (something fluffy). I found him in the street and adopted him after time at RSPCA. He's only a young dog and very sweet and smart. Gets on well with my other two dogs. Tries to be dominant but doesn't get away with it. I am strict with his behaviour, same as other dogs. His problem(s) - walking goes for any person or dog but the most worrying is when adult son was visiting on weekend he nipped him on back of leg (no skin broken- just a warning I think). Is he being protective? As I didn't raise him I don't know why he does this. I rarely get visitors and I've had him for about 1 year so have never seen him do this as when he's out he's on a lead and just barks. Could an obedience school help train this out of him? Mixing with other dogs and people at the school? Help appreciated.
Would be good if someone answered the question instead of chatting to each other about nothing to do with the question in the first place.