I have read in a couple of places lately that the extreme heat in south Texas is driving coyotes into neighborhoods in search of food, and that there has been an increase in the number of coyote attacks on both people's pets and on people and their children too. The suburb of Denver that my wife and I live in has seen several recent incidents with coyotes too, despite there being an abundance of prarie dogs for coyotes to hunt. Some of our neighborhoods which are closer to or in the mountains here have also seen an increase in incidents involving black bears looking for food too. Our suburban government has advised us not to leave pet food sitting around outside where it might attract coyotes. At least your dog is a bigger dog, because coyotes have been known to have a rather easy time with smaller dogs.
At our golf courses around here we have an abundance of both crows and magpies that will wait until you are away from your cart on both the 1st and 10th holes to get into your snacks. I once saw a magpie grab an unopened bag of potato chips and fly several hundred feet away with the bag before landing and getting the bag open within seconds. And another local golf course here has a tame fox that lives on the course that will approach golfers and beg for handouts too. I've been hit-up for my hot dog and potato chip leftovers several times by this fox. It begs just like a dog does, and is so tame that it will take food right out of golfer's hands.
Here is some online information about interacting with coyotes that has been put out by the local government here.http://www.broomfield.org/openspace/coyotes.shtml