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 Belgian Malinois is a medium-sized, hard-working dog in the sheepdog family. Although it is known in the United States as Belgian Malinois, it is often classified as a variety of the Belgian Shepherd Dog. Many dog experts use the word square to describe this dog because its body is almost as long as it is tall.