I am in the same boat as you masma, my 7 month old jack russell chews everything when i leave him alone, e chewed through the sky cable and he has just this week chewed through his third harness! i find that plenty of discipline is slowly doing the trick, as harsh as it sounds, something that may work is, getting your dog to chew something that she shouldn't be and then tell her off for chewing it until she refuses to chew it when you put it near her, i do that with my little terror and it is working. Just dont let it get to you, keep her stimulated and take her for plenty of walks. Good Luck :-)