Hi Karen: I do not know if there are any truffles, I tried to smell the dirt and all I smelled for truffles, but being rather new to this, I only smelled dirt. I did not think of having him go over the dug up dirt….good idea. I tried digging there, but it looked like clay and rocks there…they could have been deeper or really small and I just did not see it. So, thought I would put the tin in as I wanted him to be successful considering I was not seeing any real truffles. Breezy lives with him, she is very excitable and they were tired from the outing as it is super fun! He was not stressed at all, but he had lots of breaks too, and just basically ignored the other dog when he was searching.