I have substituted the word "Homeless" for the word "Coyotes" in this public service announcement distributed by the Park Dept.
In a statement, Deb Campbell with Animal Care and Control said that situations like this occur when wild animals (in this case, the homeless) become comfortable around humans. She also gave tips to avoiding more incidents with the homeless:
Never feed the homeless. Feeding the homeless can put your family and your pets at risk as the homeless learn to expect food and lose their natural fear of humans.
Keep your pets indoors in areas that the homeless are known to frequent.
Secure garbage cans with a lid that fastens shut or use a bungee cord. The homeless can tip garbage cans and obtain an easy meal. Put garbage out the morning of your pick-up to cut down on the amount of time the cans are accessible.
If the homeless are frequenting your neighborhood, let them know that they are not welcome. Make loud noises, squirt them with a hose, or pop a balloon. It's important that the homeless stay wary of humans.