I adopted a 1-year-old Border Collie mix recently. She is housebroken and stays in a crate while I am at work; however, when I'm home she's out free in the house. If I turn my back on her for a minute, even just to go to the bathroom, she finds something to get into--she'll pull the trash out of my office trash can, she'll get in the litter box and eat the cat litter, etc. I've tried to tell her no firmly when I catch her doing this, but usually by the time I get out of the bathroom or back from getting the mail, she's already shredded some papers and has moved on to doing something else. I have gotten her one of the Kong chew things and I try to fill it with the treats for it when I have to be away from her for more than a minute to distract her, but now that she's figured it out, it only distracts her for a few minutes at a time. I would eventually like to be able to leave her out of her crate when I work, but right now I can't bear the thought of what I might come home to. How can I get her to stop this behavior of eating the cat litter and shredding papers?
Also, she is very clingy. Unless I go in a room and shut a door, she is right on my heels. If I am working at the table and I stand up, even just to stretch, she gets up and is jumping around. If i get off the couch, she follows me wherever I go. Then when I'm ready to sit back down and resume work (or whatever I was doing), she tries to climb in my lap and I have to calm her back down, which takes at least 10 minutes, before I can resume what I was doing. I am very happy that she loves me and wants to be near me, but it is exhausting to have to settle her back down for so long every time I have to move an inch. How can I make her feel more calm and relaxed so that she realizes she can stay curled up and sleeping even if I get up to stretch?