How do you tell when a dog is near to have pups?

My dog began to look for a spot to lay down, and didn't really want to move. She shivered alot as well. When they are definitely ready, their water breaks the same as ours, so look for a watery puddle. Try to keep them inside, or an inclosed area so that she doesn't crawl under anything she isn't supposed to. If you want to keep an eye on her. It's really all in the behaviour.