Boarding and Day Care Rates?

I have been a sitter for about 7-8 months. I'm at the lowest rate -- 25 -- for both services I offer: boarding and day care. I have a client with a very active puppy who will book me for an entire weekend, usually from 9 am Saturday through 5 pm Sunday. Since it includes an overnight boarding situation, Rover is charging the owner just $25 ($20 of which I end up getting) for the entire weekend, even though I am having her puppy all day Saturday, Saturday night, and all day Sunday. That's effectively one boarding plus two day-care days (on the weekend). Shouldn't that be more, like, $75? Her puppy has destroyed some expensive items and I don't want to be resentful, but I feel like $25 for an entire weekend watching a destructive puppy is a problem. How should I adjust my boarding and day care rates to make for a more equitable transaction (in my view)?