I just tried to post and got an error??? Pet fee is my first Welcome email back to the guest. Way to start a relationship..." Thank you for booking now I need more MONEY please!!" VRBO has the pet fee streamlined.
I would let the guest know the reason why you need more money. Pets potty accidentally in house, scratches to wood floors, hair on furniture, chewing on furniture, etc.
I do not know what VRBO is... through AirBnB I can request money and the guest just pays it.