Food and water, written the way you actually do it
Budgies are small enough that a feeding misunderstanding shows up fast, so write the routine as quantities and habits, not generalities. State how much seed and pellet mix goes in each morning, whether the cup is refreshed or topped up, which fresh greens or vegetables your budgie will genuinely eat, and where the millet lives if it is a treat rather than a staple. A sitter who cannot tell whether the cup is full of seed or full of empty husks can leave a budgie effectively unfed while believing it has eaten, so show them the blow-the-husks-off trick in person and say plainly that the cup needs checking, not just looking at.
Water needs the same clarity: fresh every day, in the usual cup, washed rather than just rinsed if it feels slimy. If your budgie bathes in a shallow dish, say how often to offer it and to remove it after, so damp seed and droppings are not sitting in drinking water all afternoon.
The hazards a non-bird household does not know
Most sitter risks for a budgie are ordinary household things. List them explicitly: no cooking with non-stick pans in the bird's room and no oven self-clean cycles while the budgie is in the house, because overheated coatings release fumes small birds cannot tolerate; no scented candles, air fresheners, or sprays near the cage; doors and windows shut before the cage is opened, and ceiling fans off if the budgie comes out at all. Note where the cage sits and that it should not be moved into a kitchen or a draughty hallway for convenience.
Also say whether your budgie is to be let out in the sitter's home at all. Many budgies are safer staying in their cage with company and toys for a short stay than flying loose in an unfamiliar room with mirrors, gaps behind furniture, and a household unused to watching where they step.
Normal budgie behaviour, and what should trigger a call
Leave a short picture of your budgie on a good day: the chattering, head-bobbing, beak-grinding contentment, the midday nap, the usual appetite. Then describe what worries you specifically: sitting fluffed and quiet for long stretches, staying on the cage floor, tail bobbing with breathing, a sudden drop in droppings, or seed untouched beyond a few hours of daylight. Budgies are prey animals that mask weakness, so the instruction should be to call early rather than wait for certainty.
Give the sitter your number, a backup contact, and your avian vet's number, with permission and funds arranged for a vet visit if you cannot be reached. Mention any ongoing quirk the vet already knows about, so the sitter is not alarmed by an old trait or dismissive of a new one.
One walk-through beats three pages of notes
Before you leave, have the sitter do the routine once with you there: change the water, check the seed cup properly, cover the cage at the usual time. Budgies settle into a twelve-hour style rhythm of light and dark, and keeping the cover and wake times steady in a new house does more for their calm than any toy you can buy. Gathering all of this into KinsLe's Care Pass means your sitter opens one clear handover instead of hunting through scattered messages while a small bird waits for its dinner.