I'm not sure how safe or good wallboard is for dogs, or if she actually ingests it...but what about getting pieces of it for her just to chew on? This might not be a good idea; I just thought about my parrot who chewed the walls and I bought him his own wallboard (of course, HE didn't like it unless it was attached to a 2x4 stud that he could also chew
)....I think it's the sensation of it being slightly resistant, but soft enough to sink their teeth into!