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.
Tibetan Spaniel. The Tibetan Spaniel is another adorable charming little dog that boasts short legs although they are slightly more in proportion to the rest of their bodies than most other breeds. They are active and alert by nature which means there's not a lot that gets past them.