Cats chew because it’s their natural behavior. Cats are predators, and when living in the wild, they will capture small animals for food. This behavior is also retained in cats at home. When cats see anything moving, they will easily want to grab it.
This is because this can help them train their hunting skills and maintain their physical fitness of agility. Additionally, cats may want to chew out of boredom or agitation. If your cat does this frequently, consider giving them toys to satisfy their scratching urge, or spending some time playing with them to help them burn off excess energy.