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 sparkling white coat is the glory of the Samoyed breed. As would be expected for a breed of northern origin, this is a thick, harsh, straight coat with a very full undercoat. The color is a striking white though biscuit or cream coloration is allowed. The coat stands out from the body giving a fluffy appearance to the Samoyed.