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)
The outermost layer of the cerebral hemisphere which is composed of gray matter. Cortices are asymmetrical. Both hemispheres are able to analyze sensory data, perform memory functions, learn new information, form thoughts and make decisions.