Ruger is a little over 7 weeks now and has just had his first set of vaccinations. Today I took him out for a walk on the pavement for the first time, he seemed to be enjoying himself, but he was whining and shivering a little (it is a little cold her still) but he was doing good. Then a man started walking towards us and Ruger started to run behind my leg. The guy reached down to pet him and he started whining really loudly as if he had been hurt. I have never seen a lab act like this, so is it normal and what can I do to make him not be so fearful.