Why cats like to chew things:
1. When cats feel anxious, they will express their emotions by chewing on objects.
2. If a cat lacks trace elements, it may develop pica, which causes it to bite and swallow foreign objects. You can give the cat some trace element tablets. 
3. Cats are very curious. If they are curious about an object, they will satisfy their curiosity by biting or tearing it.
4. When cats are teething, their teeth itch and they will chew on things. Owners can provide them with chew sticks or chew treats.
5. When cats are bored, they will chew on things to play. You can play with them for a while or prepare some toys to attract their attention.