One of many things I've learned from the Elknut, is to definitely target specific bulls. Particularly when multiple bulls are sounding off. When you find yourself in a situation where you have several bulls that respond to your call, pick 1 and interact with that bull. As an example, if I am in that situation, and one of those bulls is a "growler", I will only call to him and only respond to him. I won't answer the other bulls that may be sounding off. Just him. Then it's a matter of reading the encounter correctly and hopefully getting into position for a shot. Or calling him your way for hopefully a great shot opportunity.