I grunted in a small buck last Friday. Not a shooter but he was definitely interested. I saw a larger older deer the following night working an edge and I grunted at him. He was not interested at all. He looked a couple times but just kept going on about his way. I have a buck roar call that I use during the height of the rut. It will bring in multiple bucks if you use it right.
Here's a pic of that little buck from Friday. His right side is already broken off.