She's a puppy still....she's bored, bored dog = destructive dog. She's not doing it to punish you she's doing it because she's bored and lonely. I would get a dog run or something for her to stay in while you're gone so she doesn't destroy something that could harm her as well. Try getting a kong toy and filling it with peanut butter/treats and freezing it and giving that to her before you leave for work. But when you are home she should be allowed to come in the house whenever she wants, she's a family member, she shouldn't have to stay outside and be isolated from the family. The more time you interact with her the less bored/destructive she will be. Cattle dogs are herding dogs, herding dogs need jobs to do they are highly intelligent and bred for work. Try frisbee, agility, etc. something with her that will keep her busy and entertained.