It depends on the Tom. They have moods like we do. I'd start by calling softer and then work up. You also can be aggressive but stay lower volume. The best thing to do is sound real. I have been listening to some CD's of live turkeys and my cadence has improved and my tone has too.
Local 4416 Hamilton County Fire Fighters
If it is bleeding or on fire I can usually fix it; Other than that we might be in trouble....