can you send your sitter extra money?

I have had clients ask to pay for an extra day as a tip. If they offer it, I certainly don't ask them to use another method. That said, Rover will charge tax and their small fee to the owner as well as take their percentage from the sitter. So obviously it's best to tip in person, if at all possible. Sometimes people are tired or rushed to finally get home and may forget all about it until they are home and ask to "extend the stay". Many ways to go about it. You can also mail a gift card or something if you boarded your dog.

It would be better to reimburse your sitter directly. Rover does not have such a mechanism and, if you use a "service booking," Rover will deduct its percentage from that amount.