All great advice.
This is a great place to learn and to be honest, the reason I got on this forum to hone in my long range hunting skill set, was for coyotes primarily. As was stated, cows, especially those calving, have coyotes near by. They eat the baby calf manure.
When you finish calling, wait 5 minutes before moving, but keep watching, smart yotes will often hold up for some reason and not come in to the noise. Many times I've gotten up to retrieve my caller to see one that had been sitting concealed, observing, take off.
When calling at night, do not stop scanning with your light, thermal, or what ever you are using to see. In the 30 to 60 second break you take, he can come in, bust you, and take off and you will never know he was there. Also, if a bright moon is out, get in the shade or shadows just like you are hunting during the day.
Not sure about up north, but February is breeding season in Texas. Find out for sure when it is because it's one of the best times to use coyote vocals.
These are just a few extra things that might help. Predator hunting is addictive, I almost enjoy taking a wise coyote as much as taking a mature whitetail. And the coyote can be just as hard to do. Do not get discouraged or give up, one day it will just click and the rascal will run over you trying to get to the call.
Have fun and be safe. Before long you will find yourself trying to purchase a new COYOTE rifle.