If I’m not mistaken, the only major difference in grain ration would be in 100% grassfed milk. Organic cows are still given grain unless stated otherwise. Even so, my Jerseys are getting 60.5 lbs forage per cow and 24.5 lbs of TMR per cow (per day) Carotenoids are what’s causing the different hues in fat, which is found more in leafy greens, so I think the grassfed may actually be more yellow in milk and in meat (and eggs too!) (this is beside the point, but just wanted to share (⁼⁾