Re-posted from

"Cummings School of Veterinary Medicine at Tufts University is providing VERY misleading information to pet owners.

In the February 2020 Tufts Veterinary School newsletter “Catnip“, there is a feature article titled “Food Labeling Terms with More Sizzle Than Substance“. The story includes the subtitle “Don’t be fooled by these words when choosing your cat’s food“. However, it appears that Tufts Cummings School of Veterinary Medicine is actually the one doing the fooling.
At the very top of their post Tufts discusses the pet food classification of “Human Grade“. Below is the full quote of this section, Tufts attempting to minimize the significance of human grade pet food.

“Human grade” is much more about the plant the food is processed in than where the food came from. For instance, chicken, whether for people or cats, comes from the same bird. It’s just that “human grade” chicken is processed in a plant or kitchen licensed to produce food for people, while chicken that gets put into pet food — which could include breast or thighs, but also nutrient-packed internal organs and the parts you pick off to make soup — goes to plants that manufacture pet food. All these ingredients work together to meet your cat’s nutrient needs. Just as important, they are pleasing to cats’ taste buds.
More to the point, products marketed as “human grade” are not necessarily higher quality nor better options in any other way. The Association of American Feed Control Officials (AAFCO) sets the standards for the levels of nutrients that should be in cat food, and that’s a separate issue from the origin of the food’s ingredients.
We should note that “human grade” food for cats tends to be relatively expensive compared to regular cat food. There’s no need to purchase it, either for your cat’s health or enjoyment of meals.”
There’s no need to purchase” human grade pet food? Seriously Tufts? VERY misleading, shame on you.
What Tufts failed to consider (and failed to explain to pet owners) is that pet foods are either human grade or feed grade. The differences between the two are significant.​" See more details on the website....