Regarding Doggy Day Care, is there a set amount of hours per day or does it vary?

The Rover guidelines describe a window of "dropping off around 7-9am and picking up around 4-6pm."

https://support.rover.com/hc/en-us/arti…

which would give someone dropping off a dog at the earliest and picking up at the latest 12 hours of care, If a dog stays with me for 12 hours over its pickup time for boarding, then I would charge for another full night and Rover's new extended care does that automatically now.

Sitters set their own hours of operation for daycare. You would establish a window for dropoff and pickup and a rate for if they need additional time. I would think that window should accommodate working pet owners. Given the potential length of time a dog may be in your care, it should approximate a boarding rate or, at a minimum, two walks.