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 breed is distinguished by its pompom tail, level back and deep angulations in the longer rear legs. An equilateral triangle shaped head, oval eyes, large upright ears, and a medium body complete the picture. The longhair Japanese Bobtail has a medium long to long coat.