I read that torts do not hear at TFO as well.From this forum. there was a time i interested in this topic. oh this topic was super hot back then, i will try to find the link tomorrow if i have time. until now i don't know which one is true. there were proves of they can hear like tidgy. there were proves also they can't hear like tom stated before, he was calling his tortoises and approached slowly from back side, and every time they startled. stop debating. i also don't know which one is true lol.