Im interested to know if there is any science or data behind these two formula varients. We all know the 30/20 works perfect for heavy conditioning and hunting. But it seems that most dog food companys offer these two formulas as well. For people only hunting weekends or conditioning 3 or so days a week which formula is best and why? They are so close to each other is it just a matter of preference? It does seem that the different companys do advertise the 24/20 for sporting working dogs, then they say the 26/18 is for active adults.