Staying In Shanghai for 18hrs with a Dog

My dog & I will be flying into Pudong International Airport at 630p.m. and will be there for an 18hr layover heading back to America. Do I do immigration? Does the shuttle allow dogs on it? Are there any pet friendly hotels anywhere near Pudong Airport? Also, is there anywhere to exchange Dollars to CNY? Are there any special papers I have to bring for my dogs to get into the country for those 18hours?
I am very incredibly nervous to be flying by myself with my dog so I want to make sure I know everything I can know before I fly.