Notably, a rating of "A" is consistent with current EU standards on glyphosate, which are the most strict governmental standards in the world. That rating is 100 ppb (parts per billion), which equates to 100 ng/ml in liquid form.

In contrast to the strict EU limits on glyphosate, the U.S. EPA allowable limits are described here. At that link, you will note that "animal feed" has a limit of 400 ppm (400,000 ppb).

Cereals and grains (except for corn) have a limit of 100 ppm (100,000 ppb). Legumes have a limit of 5 ppm (5,000 ppb). Beet sugar has an allowable limit of 15 ppm (15,000 ppb), and sweet corn has an allowable limit of 40 ppm (40,000 ppb).

Even cherries are allowed very high limits by the EPA: Up to 20 ppm (20,000 ppb).