The way we have to alter a reservation to charge the pet fee is just ridiculous! Nearly every guest I have brings a pet which involves several messages back and forth to explain how it works, alter the reservation, have them accept the reservation, etc. etc. etc.
I am an instant book host and one of the primary reasons it that it cuts down on the back and forth messages and questions - - but the minute someone wants to bring a pet - - well the messaging begins!