Answer: boxturtle

AnswerCrossword Clue
BOXTURTLECritter in a domed shell
BOXTURTLETennessee's state reptile
BOXTURTLEShelled omnivore
BOXTURTLEPet that hisses when frightened
BOXTURTLESpar with a pet?
BOXTURTLEShelled North American creature
BOXTURTLEHard-shelled critter