But he could be moving in on a hen so one should call more . . . right?
Have to admit that I've wrestled with this myself and by my measure, the reason he is not responding, is because he is currently with hens, that you might not be seeing and does not want to lose them. This year, for some reason, we kept running into this problem, day after day. We finally set up different and when they did not respond, we called less. Sure enough, one came in, making no sound and my buddy got the shot. ....
Be Safe !!!