I have a 2 year old shep cross. She is so well behaved in everyway, except for the damage she causes to gauze doors. She rises onto her rear legs and scratches at the gauze. After several days, she manages to claw right through it. She seems to like the noise it creates, and enjoys scraping her claws, a bit like a cat. She mostly does it when we are out, as she knows it is wrong to do it, and will not do it when we are home.
Any ideas on how to stop this, as it is costing a fortune to constantly repair.