Questionable client activity?

If it was booked through rover, I would probably be less concerned. Maybe they want to keep all the family dogs booked under one account, for whatever reason. If there’s any information that you still need, Ask for it. If you want it documented so rover staff can review if necessary later, use the rover messages. And I think there’s a significant number of sitters now (especially after going through pandemic) that do not invite owners inside home.