I really don't know and honestly didn't even know you could give flax seed to cattle. Last year at a friends house a horse person came in talking about flax seed. She said give flax seed to make a coat shinny for showing. I ask the same question as to how much, she said just sprinkle a little. I didn't show any of my cattle this year (I was in the hospital) so I didn't try it. I have a good feed program going with my older cows and heifers so I'm just afraid to mess with what's already working for me.