1 Certain parts of the brain shrink, especially the prefrontal cortex (an area at the front of the frontal lobe) and the hippocampus. 2  Both areas are important to learning, memory, planning, and other complex mental activities.
Some big, fluffy dog breeds are the chow chow, the samoyed, the standard poodle, the old English sheepdog and the keeshond. The abundant, fluffy coats of these dogs require constant care. Keep Learning.
The Great Dane is largest dog breed that originally German breed dog and some called it German Mastiff or Deutsche Dogge. Great Dane enjoys socialization with human and kids, Great Dane is usually found with spots (harlequin), while most are solid colored (fawn, black, blue, brindle) or mostly solid (Mantle).