Originally Posted by
Abulafia
I just want to focus on the first part of this. I think that you (the OP) are viewing the crate as a human would, and not as a dog would (and I note that this is your first dog). To a human, a crate looks like a box, a prison, a confinement. Humans do like confinements—caves, tents, shelters, homes—but we tend to like them a little larger. But even within homes, we—typically, if we are lucky enough—have many different rooms. Rooms where we cook, where we eat, where we read, where we eliminate, where we sleep. These rooms are all types of confinements, if of our making.
Wild dogs and wolves choose—and create—dens where they sleep at night and rest during the day, when they are not actively on guard or looking for food. Domesticated dogs that go feral almost always will find a den where they can retreat and feel safe. They don't spend their whole time there, but they like it at night—since dogs are diurnal—because it tells them that they are protected and secure. When they are crated and you are near them, it tells them that you are on guard, and they can relax.
Because it sounds like your dog had not earlier been introduced to a crate, she is not used to it. But I assure you that it is in a dog's personality to want a den. When she gets much older, it will probably just be in a bed next to yours. But for her younger years, her comfort, and her safety, a den, whatever you call it, is what she wants and needs.