Gnawing on cot!!!

Went in his room and found him gnawing on his crib and he’s left little beaver marks! After being initially terrified that he’ll be in danger from paint/wood chips, I’ve had to calm down and remember that I chewed the end of pencils down at school and I’m okay 😂. Seriously though, has anyone’s baby decided to gnaw their crib?? I think I need a teething rail!