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.
Big White Dog Breeds. Big white dog breeds are those white dogs which meet in white color and big sizes. Their big and large stance in enchanting white color coating may create a white dog mania in your heart. Not only regal in color, but big white dog breed is also sober in personality. These dogs may touch your heart in a glance.