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 Adoptable Great Pyrenees Mixes. Puppy Breed: German Shepherd Dog / Great Pyrenees. These puppies will grow up to be nice and large. They are so beautiful and exhibit many signs of Great Pyrenees. Typical of a Pyrenees mix is the dark spot on the middle of the tail and the black spots on the belly. The mother really looks half German Shepherd and might have Lab in the other half.