english: They'll gnaw on things or do other things that may also soothe them, even if they're self-destructive, which could be considered similar to the ways that some humans cut themselves.
non_english: Ze knagen op dingen of doen andere dingen om te kalmeren, ondanks hun zelfvernietigende gedrag. Dat kun je vergelijken met de manier waarop sommige mensen  zich snijden.