I used the small can last season with no results. I mis up my grunt tubes so as not to broadcast the same exact sound day after day in the woods. I was throwing in the can hear and there and never pulled a deer in. I tipped the can with a doe in sight, but not in range, same with a buck a different night - in both cases the deer looked up and in my direction, but didn't care in the least. Didn't spook them though.