Yes — and you should treat it as a condition of the booking, not a favour. Birds are conservative eaters: many will refuse unfamiliar food outright, and a parrot, finch, or cockatiel who barely eats for days in a strange place loses condition quickly and worries everyone. A competent boarder expects owners to supply the usual diet and feeds it exactly as instructed, because the boarder's real job is keeping your bird's world as unchanged as possible while its address temporarily changes.
What to pack, and how to portion it
Send the exact staple food your bird eats now — the same pellet, the same seed mix — in sealed daily portions, one bag per day plus a couple of spare days in case your return is delayed. Daily bags remove judgement calls: the boarder empties one bag, sees at a glance how much was actually eaten, and can tell you honestly if a day went badly. Add the fresh component as written instructions with a small shopping list, since chopped vegetables and greens cannot travel for a long stay: what to offer, roughly how much, and when in the day your bird expects it.
The written feeding card that prevents mistakes
Alongside the food, leave a short card covering the details a stranger cannot guess. Name favourite treats and how they are used — a particular piece of nut after a step-up, for instance — because treats are often how a boarder wins a nervous bird's trust. List absolute exclusions for birds generally and for yours in particular: avocado, chocolate, caffeine, and salty human food never belong in a bird's bowl, and your bird may have individual sensitivities the boarder should know. Note water habits too, including whether bowls are changed twice daily and whether your bird bathes in its drinking water and needs a separate bathing dish.
Questions to settle before you book
Ask the boarder directly whether your food will be used rather than a house mixture, how fresh food is prepared and stored, and how they handle a bird who refuses to eat — the reassuring answer involves contacting you and, if needed, a vet rather than simply waiting. Confirm that other boarded birds' food stays separate, since mixing diets between birds also spreads germs between bowls. If a boarder seems offended by these questions, choose a different boarder; the good ones ask most of them themselves.
While you are away
Agree how updates come: a brief daily note on eating is worth more than a photograph alone, because appetite is the earliest health signal in a boarded bird. On collection, ask what was left uneaten and whether droppings and behaviour stayed normal, and weigh your bird at home to confirm the stay cost him nothing. Sharing the portion plan, treat list, and exclusions through KinsLe's Care Pass gives the boarder temporary, clear access to your bird's exact feeding routine, so every meal stays the one your bird recognises.