How about making it easy on everyone and help them observe the fast not only from sunup to sundown, but also from sundown to sunup.
We are way too caring.
Some of them went on hungerstrike, and instead of letting themselves starve to death, we fed them through feeding tubes.
I would have let them starve. Brought him the food, some really good specials that are their favorites, those nice glazed chicken and rice dishes, let them smell the aroma, then if they don't eat, well let them starve.
Then they complained that it was "torture" that we fed them.
(we only put those temporary feeding tubes in, that go in through the nose, not the permanent ones for which surgery is needed).