Some Raw Milk suppliers will sell their stuff on the black market as pet food, in order to avoid persecution under idiocratic anti raw laws.
Some independent companies will sell higher quality meats as dog food( with a wink wink) in order to avoid having pay the extra toll to have it officially inspected.
Its sad to say that there may indeed be pet food suppliers who could get better quality meats than what is sold in the local human food store.
I wouldn't recommend it unless you are absolutely sure of the quality of the Animals being sold under the all natural label. The site does not specify the source of the meat....so buyer beware