If you have "small" pet dogs, cats or little kids, yes, be concerned.
A pack of coy-wolves will go after a large dog, too.
An especially hard winter will force them to behave "abnormally", such as the incident with my dad.
Farmers here go through the yearly spring ritual of staking out their calving cows and sheep herds.
Lambs and calves get taken frequently.
In the last few years, I've seen coyotes that did not move from my approaching car. A pair were 30 feet away, when I stopped my car and yelled at them with the window down. They weren't scared at all.
A couple of months ago, I spotted a cougar on a road quarter of a mile from an elementary school. I called the State Patrol, and a game agent returned my call (at five in the morning). This cougar was spotted about once a month and was a good guy, keeping to regular game.
There are wild things out there. The more wimpified our culture gets, the scarier they get. We aren't being their predators anymore. Why should they be afraid?
DK