I do love to hunt predators. We don't have jackrabbits around here but I have called them in using it. I'm always mixing it up so they won't get to educated to the calling. I like using a jackrabbit on public lands cause most people beat them with cottontail distress. Coyotes do learn and get educated quick, especially if they have been shot at. Lucky for me and most people who hunt their hunger drive can override their smartness most of the time. You can mix in challenge howls every now and than. It's still breeding season so they can be territorial. If I challenge howl I almost always follow up with 2 to 3 series of distress sounds. I may try and post a video of some calling techniques I use if I can gets some free time. If your using a hand call make sure you make it sound like your dying, Put some passion and emotion in your calling and us different pitches. A real life rabbit when being eaten or injured will cry, whine, scream and whimper all in the same breath. Your goal is to try and sound as close and real to that. If I think of anything else I will post it and if you have any question please ask. I'm not an expert and I still learn new things every time I go out or talk about predator hunting.