I've been working with Verbena on her crate training. I will occasionally put her in the crate and then sit on the couch and watch tv (the crate is right in front of the tv, facing the couch). And she just sits in there calmly waiting to be let out, but if she knows that I'm actually leaving it's a different story. I have a sheet in there for her, but she has ripped it to shreds now. How do I train her not to rip at the sheet if she only does it when I'm not looking? She's very smart and knows the difference between "this is crate time" versus "they are leaving me here alone time".