http://www.humanesociety.org/animals/coyotes/tips/hazing_guidelines.html
Hazing
Hazing is a method that makes use of deterrents to move an animal out of an area or discourage an undesirable behavior or activity. Hazing can help maintain a coyote?s fear of humans and deter them from backyards and play spaces.
Methods of hazing
Using a variety of different hazing tools is critical so that coyotes don?t get used to redundant or single stimulus devices, sounds, and actions.
Yelling and waving your arms while approaching the coyote
Noisemakers: Voice, whistles, air horns, bells, ?shaker? cans full of marbles or pennies, pots, lid or pie pans banged together
Projectiles: sticks, small rocks, cans, tennis balls or rubber balls
Other: hoses, water guns with vinegar water, spray bottles with vinegar water, pepper spray or bear repellent
?Go away coyote!?
The simplest method of hazing a coyote involves being loud and large:
Stand tall, wave your arms, and yell at the coyote, approaching him if necessary, until he runs away as demonstrated in this coyote hazing video.
If a coyote has not been hazed before, he may not immediately run away when you yell at him. If this happens, you may need to walk towards the coyote and increase the intensity of your hazing.
The coyote may run away, but then stop after a distance and look at you. It is important to continue to go after the coyote until he completely leaves the area. You may need to use different tactics, such as noisemakers, stomping your feet, or spraying the coyote with a hose, to get him to leave.
Dog-walking tools
There are several tools that you can carry with you while walking your dog that can be used to repel coyotes. These include:
Homemade noisemakers
Whistle or small air horn (you can purchase small air horn ?necklaces?)
Squirt guns
Pepper spray
Sticks or other objects to throw towards (but not at) the coyote
In your yard
Remember, keeping pets and pet food inside is the best way to keep coyotes out of your yard. If you do encounter coyotes, all of the above methods can be used in your yard at home. First, try the ?Go away coyote!? method (yell and wave your arms as you approach the coyote). Here are some additional methods you can also use:
Squirt the coyote with your garden hose
Spray the coyote with vinegar water
Bang pots and pans together
Important things to remember
Never run away from a coyote!
The coyote may not leave at first, but if you approach him closer and/or increase the intensity of your hazing, he will run away.
If the coyote runs away a short distance and then stops and looks at you, continue hazing until he leaves the area entirely.
After you have successfully hazed a coyote, he or she may return. Continue to haze the coyote as you did before; it usually takes only one or two times to haze a coyote away for good.