[jlaack]

Yes find a trainer and/or behaviorist to work on manners and obedience and take him through more classes. While in a group setting dogs learn to perform commands there is other learning that goes on; socialization, being around distractions, being in a new environment, etc. I would do both classes and in house work with a trainer. Since he is probably bigger and stronger than he was when you got him as a five week old pup you need to address this sooner rather than later, especially with a human baby on the way. When you first got your pup it was recommended that you rehome him to rescue (if I am recalling correctly) I hope you are committed to this dog that was sure to be a challenge to raise based on the circumstances of his coming to live with you at such a young age.