Probably a big boss gobbler around and they won't tolerate much gobbling from young birds.
I dealt with it for 2-3 years one time, very little or no gobbling, I finally killed the old bird and 3 days later, it sounded like a gobbling contest in the area.
They are there but do not want a butt kicking, so they will come in quietly and sneaky
Kill the Boss and you will hear them
