Are Pine Shavings Safe for Birds?

Unless the bird ingests this material, untreated pine shavings are considered safe enough to be their cage bedding. However, a lot of pet owners do not prefer this due to impracticality. Unlike other organic materials, you will have to sift through the pine shavings before use to ensure no debris is stuck there.

Source: https://birdingdepot.com/best-bedding-for-bird-cages/