Hi Nancy, it sounds very much like our dog has started to believe that it’s his job to protect his pack/family. His barking is an alert to a potential danger entering the home, but there is a way you can encourage him to stop. I would ask guests and visitors to delay greeting him (no eye contact or speaking to) until he is calm and relaxed in their presence. If he barks at them calmly remove him from the room until he is quite and then allow him to return, repeat as many times as necessary. You can even have him on-leash with you for greater control. When he is quiet and totally relaxed in your guest’s presence then you can ask them to invite him to them to say ‘hi’.
We definitely cover this issue on my membership website TheOnlineDogTrainer.com…..maybe take a look, we have a special offer on at the moment. All the Best, Doggy Dan

Hi Denise, thanks for sharing your story!
It can be a bit of a hard realisation to arrive at for many owners, especially those who may be loyal to a particular breed or size of dog. I always try to provide information that may be helpful not just now, but also in the future, and it’s sometimes things that owners have never thought about. It sounds like you’re on the right track with your boy. He is still young and learning about the world around him and where he fits into his family. The best piece of advice I can give is to provide him with clear and consistent information…..and remember to work at his pace. All the Best, Doggy Dan