Why do budgies eat their sandpaper?
The sand/grit helps aid their digestion.
Pet budgies kept in a cage will not eat much if the cage is small, and they are not expending any energy. Keep your budgie happy: talk to it, interact with it, and give it toys to play with. Budgies like other budgies - real or fake! - ladders and toys that make a bit of noise, such as bells. When you give your budgie something to do, it will be much happier, use more…
Budgies are primarily herbivores. This means they will mainly eat seed, vegetables, plants and fruits. However they are also known to occasionally eat insects, though not as often as vegetation, also making them insectivores. To answer your question, a budgie will not eat meat because it is primarily a herbivore. However they may occasionally eat insects.
It is best to feed budgerigars [budgies] pellet food and not mixed birdseed. Budgies can also eat fruit and vegetables, the only food that is not okay for them to eat is cantaloupe. Cantaloupe is poison to the budgie. The budgie can also eat any kind of grain, even your cereal if it doesn't have sugar in it.
eat seed and grit, sleep, stretch, fly around and flap their wings, play with mirror, preen themselves, check for fleas, bathe and wash in bird bath, drink water, peck at sandpaper, bars of cage, squak, sing and tweet, nibble at seed, poo, sit and stand quietly, preen and lick feathers and wings, perch on stands and claw bars