100 percent grass fed isn’t that great. We used to have a family ‘hobby’ farm and the cows did do grass feeding in the summer, and hay in the winter…but they were supplemented with a couple of types of bagged horse feed. The ‘pellet’ type and molasses soaked oats and grain mix.
I’d put that stuff up to “Kobe” beef any day…lots of thin spiderweb fat in the steaks.
Even in the summer they got the horse food twice a week. Winter it was every day.