The information came from a blog. Where the woman contacted the company for more information and shared that info. ANd she reviewed other butters as well.

https://www.butteredsideupblog.com/...ss-fed-butters/

There cannot be 100% grass fed. There are many reasons to feed grains and hay as well.

The kerry gold seems to be a better option. Ireland is not a corn growing area, nor soy.

https://www.cso.ie/en/releasesandpu...ionofcrops2016/

Accoring to the following article, corn is ensiled. That means for anyone not into farming, the entire corn stalk is shredded and pickled. A very good feed for milkers.