Realising just how drastic of a change your one action did, your mind races to many possibilities for another drastic change. Thinking of a simple idea, you decide to switch dogs and humans around with their names.
First things first was that you were having trouble with the clothes you were wearing. Since your clothes didn't change along with your body, you entered your sister's, or now your room to get a spare change of clothes. Changing into a bra and panties with a pink tank top and bum shorts, you went back to the book.
Writing out the changes, you made it so that every current human would be referred to, and act like a dog. This meant that the current humans wouldn't wear any clothes with the exception of a collar if they were owned, and they would feel cold despite being exposed to the cold air.. They would also walk on all fours which means that their hands and feet would gain pass so they would comfortably walk on the ground.
For the current dogs, they would change to take the dominant role of society. They would drive, be able to speak and do what humans would've done. They will also take on an anthropomorphic appearance as they would need hand like appendages to do normal tasks. They would also wear clothes and shoes since their bodies can't handle the cold despite having fur.
With this set in, you waited to see how you would change.