exciting isn't it,many times they are on you so fast you dont have time to think,those head shots are easy to miss it happens to everybody,just try again,you might try howls,they will sometimes respond to howls when distress sounds have no effect,just don't howl to much.I sometimes make an interrogation howl or two before I start to use distress calls just to make them think there is an intruder eating their food.Welcome to the sport it's very exciting it will give you many fond memories inthe field.I would give them a few days atleast to settle down.I'm sure if you ask some local farmers they will let you coyote hunt,I've been given permission to predator hunt on farms that I can only dream about being able to deer hunt on.Keep on hunting and you will surely score,and an encounter is very rewarding even if you dont kill it,you were still successful at tricking a very smart,illusive animal into range!!