Punjabi Wisdom 1: Dog and tiger

I have a book from which I will be quoting famous punjabi quotes from time to time. There are thousnads of such sayings whch have been orally transmitted to our elders over the centuries. They are very wity, speacially if you are familiar with punjabi:

Apni galee which kuta wee shair hounda hay

Even a dog is a tiger in his own street

The above quote implies that even a dog can act like a tiger when it is in its own backyard. So even a week person can be brave when he is in his own backyard. This is obvious in sports where even week sports teams can be hard to beat at home. It may be the psycological advantage that you given that you are familiar with all the conditions which may arise.

Or it could also mean at the dog may have lots more friends in it's own backyard which may make itas effective as a tiger.