We have lived in this house for four and a half years and, for the most part, the dogs have always stayed in the yard by the house. They have 14 acres to run on after all...why should they need to leave the property?
I guess the answer to that is because they are bored, want to play with the dog next door, and want to dig in my neighbor's trash. Thankfully, my neighbors have never complained. I only know my dogs dig in their trash because I find trash for foods we don't eat in our yard.