Yes and yes. Just as "you are what you eat" cows are what they eat. Their natural diet is grass. Corn is an unnatural food for them & these days most cows are fed toxic pesticide-laden gmo corn. Corn-fed beef has many unhealthy fats & pesticide residues. Grassfed beef is lower in fat & has a much higher amount of healthy fats like omega 3 fats & cla. I consider grassfed beef to be healthy ®ular beef unhealthy!