1 Amazon has a selection of dog training books starting under $10. 2  Some shelters offer low-cost training, starting at about $35 and up for several weeks of classes. 3  The cost is usually lower for a dog adopted from that shelter. 4  Some boarding training programs offer a discount for a second dog from the same household. Amazon has a selection of dog training books starting under $10. 2  Some shelters offer low-cost training, starting at about $35 and up for several weeks of classes. 3  The cost is usually lower for a dog adopted from that shelter. 4  Some boarding training programs offer a discount for a second dog from the same household.
cortices. 1  1a (1) : the outer or superficial part of an organ or bodily structure (such as the kidney, adrenal gland, or cerebellum or a bone); especially : cerebral cortex (2) : the proteinaceous usually pigmented layer of a hair below the cuticleb : the outer part of some organisms (such as paramecia)
This is typically 2- 3 mm thick, covering the gyri and sulci. Certain cortical regions have somewhat simpler functions, termed the primary cortices. These include areas directly receiving sensory input (vision, hearing, somatic sensation) or directly involved in production of limb or eye movements.