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.
Learn About Different Types Of Retrievers. Golden Retrievers are a large breed of dog. They are muscular and have a thick coat, which is gold to pale cream in color. This coat is water resistant, which makes them great outdoor dogs. They have medium length fur, which can be flat, wavy, or curly, and a well feathered tail.