Since the time the dog has accompanied us on our journey through life, he began to be used for work and to amuse its master. Originally he guarded herds and dwellings, accompanied humans on hunting and pulled sleds with cargo. Nowadays, dog also helps the blind, dog is deployed in rescue operations, dog is used by police and army to protect or to do drug searches, and last but not least for its master, and sometimes with him compete. So all working dogs have different nutritional requirements than their colleagues at home which just warm a bed.