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.
Siberian Husky Chukcha, Chuksha, Husky, Icee, and Sibe. Ranging from medium to large in size, the Siberian Husky is a working dog breed that was developed in Siberia. A member of the Spitz family, the Siberian Husky has a double coat of thick fur, perky ears, and unique markings.