Sorry Sasami, but I'm afraid I said nothing insulting towards the O.P, he's done the insults, :/
You said the food uses potato, so I simply said why potato was a horrid choice. I misread the "protein" portion, but I've seen many of the "higher-rated" pet food companies using potato protein. Companies use carbohydrates because they think carnivores work like we do - storing carbohydrates to use as energy later, which carnivores do not do. And I still can't take any of your knowledge at face value since veterinarians know absolutely nothing about pet nutrition. 'Nough said. Nutrition is best left to the nutritionists - veterinarians are schooled in the medicinal, NOT the nutritional.
Parasites naturally pick out the weak, and use them as hosts until they die, then they move to the next. That's the world we live in. Carnivores have to be transitioned slowly to a raw diet, because of the havoc we've wreaked on their digestive system from feeding them horrible, biologically-incorrect foods. In taking the time, and patience, to transition them to a raw meat diet, their body restores itself, but a lot of people take the easy route and add in supplemental enzymes to help the transition along, because we've just done THAT much damage.
The only thing domestication does to the digestive tract of any creature is mess around with its natural abilities to digest what it was designed to digest. It's nothing that can't be repaired with a lot of time and effort. So if you've seen ferrets with parasites from eating raw meat, I'm willing to bet they accumulated parasites because the owner(s) did not take their time to transition them properly. Now, if you're also concerned about the bacteria, bacteria is naturally-occurring. All carnivores, and even humans, have naturally-occurring E-coli and Salmonella in our digestive tracts. Parasites become an issue when the food we eat is infiltrated with too many E-coli and Salmonella bacteria, and it essentially over-runs the naturally-occurring E-coli and Salmonella in our digestive tract. Same applies to carnivores, infiltrating our digestive tract with too many of those bacteria creates the perfect environment that parasites LOVE to take advantage of.
Because of the horrible, biologically-inappropriate foods we feed our pet carnivores out of convenience, they start losing the enzymes that are needed in digesting raw meat, which is why it's even more important to take the transition slowly, so they start gaining back those enzymes.
Still...I can't take anything you say seriously, veterinarians shouldn't be schooling anyone, or claiming that they know anything about nutrition....because they don't. Veterinarians advocate Science Diet and Purina for the simple reason they're funding their clinics, I can't say I don't understand the desire to get as much funding as you can, but to promote the food without doing the research into it...or doing the researching into why it's bad, and promoting it anyways is just.....wrong.
But that's besides the point. I'm leaving this thread because it's aggravating that your veterinarian is making you believe he/she knows about animal nutrition, and that in return, you're trying to spread it, when you should *really* be taking nutrition classes instead, if you're that interested in animal nutrition. Your veterinarian is steering you in completely the wrong direction, and I feel sorry for you.