My dog is a 90 lb Malamute that people are constantly asking me "Is he part wolf?" Well of course, they were domesticated and bred from wolves and some now extinct indigenous dog thousands of years ago. As I understand it, a big dog may decrease the chances of someone trying to mess with you.
We used to have two Malamutes when I was about 10 years old. They are awesome.
On a side note, I've just finished up bush-hogging, again. I'm done for a month or two, thank God. But, work around here ain't never done.