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.
A strong work ethic dog, the Bergamasco is a big fluffy breed with distinguishing characteristics of its coat. The hairs seem to be âdog hairs, âgoat hairs, while wool can also be noticed. These hairs combine to form black or gray mats which grow throughout Read More. Image.
Largest Dog Breeds: French Mastiff The Dogue de Bordeaux is said to have the largest head in the canine world in proportion to the rest of the body. The average Dogue de Bordeaux measures 23 to 30 inches, and weighs 120 to 145 pounds.