My cocker will dig until the fabric on the sofa cushions wear thin. When I stop her she huffs, lies down, stares at me, and I swear I can hear her think "I'm not allowed to do anything ever!" She stops when I tell her to, but she'll do it again next time. It's like she can't help herself. I've decided to let her dig in her own bed, but I stop her when she does it on furniture or carpets. No helpful advice here I'm afraid.