My family bred boxers when I was growing up. When our first boxer Tink was getting along in her first pregnancy she started her nesting process by trying to find where she was going to give birth to the first of many. In my mom's bedroom there were two closets. The one that was my father's (who had passed several years before) was kind of a receptacle of old clothes that could to tossed on the floor of his closet and ultimately go to Goodwill. Mom noticed that Tink had taken to sleeping in the closet on the pile of clothes and realized what she was intending to do.
It was winter so we knew we wanted her to have the pups inside so one day Mom took the clothes out of the floor of Dad's closet, put them on the floor of her own closet and laid out several layers of newspaper on the floor of Dad's closet. We went out somewhere that evening and came back to find that Tink had taken the newspaper from Dad's closet, shredded it all to hell all around the bedroom, and pulled all the clothes from Mom's closet floor and put them back into Dad's closet and was on puppy #3 by the time we got home.
Who says dogs are dumb? They know... they know full well! They just don't act cocky about it like cats do.