My first guess is a wolf as I know they are in your area.. However do not let the size fool you.. Here the eastern coyote can and do get just as big.. Some coyotes here have been known to wiegh as much as 80lbs.. Those ones are believed to be 80% wolf though.. Making them one heck of a killing machine. Also coyotes here have been helping to keep the turkey population down as well.. It was determind here to not to let wolves go as they have already been crossbreeding with the coyotes.. So we are safe from wolves I guess.. But have some thing worse instead..