India is asserting that there should be strict certification delineating that imported milk comes from cows that have not been fed animal-based products such as meat or blood. India has termed this as a "non-negotiable red line".
source https://www.ndtv.com/world-news/why-non-veg-milk-from-cows-is-becoming-a-trade-barrier-for-india-and-us-8881459#publisher=newsstand
source https://www.ndtv.com/world-news/why-non-veg-milk-from-cows-is-becoming-a-trade-barrier-for-india-and-us-8881459#publisher=newsstand