Sitting over night and caring for the dog all day the next day; two fees?

If you are booking a dog to stay the night, would the client need to pay doggie day care for the next day if the dog is staying until late into the evening? So let's say dog is dropped off on Saturday at 11am and leaves 7pm on Sunday. I charge for nightly is $30 a night and $25 a day for day care. Should I be charging a second fee since they aren't leaving after 24hrs? I feel like I am losing money here and keeping a dog next to nothing for staying.