A barking dog never bites.
More Italian Proverbs:
Gluttony kills more than the sword.Italian
He that is good for something is the ass of the public.
Italian
All the brains are not in one head.
Italian
One who wants to keep their yard tidy does not reserve a plot for the weeds.
Italian
He has done like the Perugian who, when his head was broken, ran home for his helmet.
Italian
He who does the wrong forgets it, but not he who receives it.
Italian