There are, as we all know, differences in the biochemical makeup between dogs and humans. Dogs, for example, don’t sweat and dogs have a tougher digestive system – genetically they are scavengers that can survive on less nutrition But there are important similarities. Just one example is creatine. Creatine is now one of the most popular substances used by all world class athletes – including body builders and football players. It was discovered at the turn of the 20th century, but not popularized until Bob Fritz (created the Unipro that changed to the Peak Performance so many canine athletes used in the 1980s.