With my coyote calling, I howled at a majority of my calling stands. I would begin with a lone howl with my open reed call and pause for 5-10 seconds then follow with a couple of barks and howl, another short pause and finish with a lone howl. The use of various howls is important in territoriality with coyotes. A howl may sound the alarm that a coyote has invaded another coyotes territory and most coyotes will come in silently, without howling back to check out their invader. In some cases, I have spotted the aggressive coyotes approaching my calling stand in the first few minutes. After a two minute listening and watching period, if I didn’t have any howling responses, I would voice howl with a lone howl, pause and then a couple of barks with a howl, pause again and I end up with another lone howl. If nothing is spotted in the next few minutes, I would start with the rabbit distress with my call for 30 seconds - pause for a minute, repeating this calling and pausing sequence. Constantly scan the calling area for the approaching predator. Listen for noises and watch for suspicious movement of other animals (birds flushing or livestock running). Callers would be surprised to know how many times they called in a coyote, but just didn't see the critter. Most coyotes will approach the caller from the downwind direction and if they scent or spot the caller, they will depart unnoticed.
Calling should begin softly; you may be closer to the predator than you think. The pattern should be a series of 12-15 long or short distress cries, lasting for 30 seconds, followed by a one minute pause, after the first two series, if no predators are spotted, increase the volume on the remaining series for maximum range. Repeat this alternate calling and waiting process. Be patient at each calling stand, I normally stay at each calling stand for only 15 minutes. Over the years, with the majority of the coyotes that I have called in - most were shot within the first 8 minutes at each stand.
For variance with your calling stands, you may start with the pup distress and later try the rabbit distress. If nothing is spotted after 12 minutes of various calls, you may try another short series of howls, wait another 2-3 minutes, if no coyotes are spotted, you can move to another stand. Most callers will move a distance of at least a mile to their next calling stand.