The short answer

Yes — but only as an occasional treat, because they're fatty.

Why

Budgies adore sunflower seeds, but they're high in fat and low in some nutrients, so relying on them leads to weight and health problems. Treat them like candy, not a staple.

How to feed it

Offer a few seeds by hand as a reward, or a small sprinkle on food.

How much & how often

Just a few, occasionally — not a daily habit.