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.
One of the most popular toys for any type of large breed dog is the Kong. A Kong is made of sturdy rubber that is meant to be chewed. Though it makes a perfect chew toy, it is more popular for mentally stimulating dogs as a treat dispenser.