Good morning, Amy....this is normal behavior when a dog is fearful...the rescue dogs often have these fears of other people or things that they do not know.
It is important for you to "Desensitize" PJ by following these instructions:
1. Purchase a DAP Collar at the pet store. This is a canine pheromone that acts as a calming agent.
2. Take PJ to an obedience school to establish yourself as the "Alpha Dog" so he will listen to you.
3. Carry a coke can with pennies in it and when this bad behavior comes out, shake the can loudly and say a strong NO!
4. Introduce PJ to many people so he will understand that these are not going to hurt him.
Your vet will have stronger medications to help PJ past this if this is not enough, Amy. In most cases, this is enough to get PJ past these fears.
Does that make sense to you, Amy?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please Reply so I can clarify for you
Sincerely, XXXXX XXXXX