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.
You may be surprised to learn that your puppy's curly tail can help you figure out what breed of dog he is. Puppies with curly tails often have specialized breeding that goes back several generations. The curly tail is a unique feature of a handful of different dog breeds. Pug Pugs are a toy-size breed of canine with tails that curl upwards rather than hang down. The tail should be set fairly high on the dog's rear and some pugs have tails that curl twice rather than just once. Pugs have broad heads, large dark eyes and short, almost smushed-looking muzzles.