Assume the beak needs a job
Chewing, shredding, peeling, and testing objects are normal for many birds. A bird with no safe chewing work will often invent its own project.
Updated
Bird behavior
Chewing is normal; unsafe chewing is a setup problem.
Parrots and many other birds need to use their beaks. The owner job is to provide safe outlets and protect the room before curiosity turns expensive or dangerous.

Chewing, shredding, peeling, and testing objects are normal for many birds. A bird with no safe chewing work will often invent its own project.
Use bird-safe wood, paper, cardboard, palm, vine, cork, and species-appropriate chew toys. Rotate a few at a time so the cage stays usable instead of crowded.
Cover or remove cords, toxic plants, candles, open water, small swallowable objects, unsafe metals, lead paint, sharp edges, and anything you cannot supervise.
Move the bird to a play stand, offer a safe chew, or cue a station before the bird locks onto furniture or trim. Reward the safe choice right away.
Chewing that spikes when the bird is ignored, overtired, underworked, or left in a dull cage is not random. Improve sleep, foraging, movement, and daily attention.
If chewing changes suddenly, the beak looks abnormal, the bird drops food, loses weight, or seems painful, call an avian vet.
Use supplies as structure, not shortcuts. The goal is to make calm choices easier for the bird.
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Plain bird-safe chewing work gives busy beaks something useful to do.

Turns part of the meal into a simple job instead of a full bowl of boredom.

Varied perch diameters support normal feet better than one smooth dowel.

Gives short trust-building sessions a low, predictable place to happen.
Many birds explore and maintain their beak by chewing. The routine needs enough safe materials and better room protection.
Plain cardboard can be useful for some birds, but avoid glue, ink, tape, staples, coatings, and nest-like enclosed spaces.
Supervise more closely, block access, offer a better chew spot, and reward the bird for using it before furniture chewing starts.