Biscuit did this until he was neutered He then stopped almost immediately after getting him home! Doesn't help now, but maybe will if his plums are dropping soon!
mylo still carried on when he was neutered, i hoped that would have stopped him but it didnt! Buyin a new rug and changing the scenery has stopped him, he hasnt chewed it too pieces (yet!) and we have had it about 3 months so fingers crossed!!!!
Oscar used to chew the carpet, but always went for the corners or edges.
I bought loads of carpet samples (like tiny rugs) and put them in the most vulnerable spots.
He chewed a fair few of those up, but eventually it whittled down to just two mats in his "favourite" spots.