Thor's pet,I know all about feisty JRT's,my son got one after his divorce.
Kita,chewed everything in my sons little condo,doors,table-legs,walls,door-frames,carpets etc...I crochet a nice blanket for her bed,it was in shreds in 30 min.
One comfort to you,it will stop once he gets older,Kita is now about 10yrs old and has been an angel since about 2yrs old.