5. Australian Shepherd
Australian Shepherds developed in the western United States to herd livestock in rugged terrain. Like other herding breeds, “Aussies” possess high energy, keen environmental awareness, and a strong drive to control their immediate surroundings. They forge powerful attachments to primary caregivers and monitor household movements constantly. When you depart, an Australian Shepherd often feels a loss of environmental control, triggering frantic pacing, barking, and attempts to locate missing family members.