Sort've related, but here in Australia pet food manufactures are not required to list the nutritional content of their foods, whereas in the US as I understand it they do.
They do but the nutritional information guides you to feeding your dog 20,000kcal a day. The suggested serving size on every brand I've seen is about 5 cups for a 70lb dog, whereas my dog gains weight on more than one cup.
At least the "grain free" labels appear to be accurate.
That means I can dump woodchips into capsules and sell them as Multivitamins with 12 vitamins & minerals, and nobody would be the wiser.
There is more rigorous testing being done in underground steroid + peptide communities than in legal nutritional supplements.
Crazy world where you can trust vialed peptides from China more than something you bought on Amazon...