We move our meat chickens to a new patch of grass every single day and they are fed genetically modified organism-free (AKA GMO-Free or Non-GMO) Ohio grown feed. The term pasture raised has recently lost its luster because it was changed to be defined by FSIS as "availabilty to pasture."
Nutrional Differences
VITAMIN A in pasture-raised eggs increases between 38% and 73% compared to a free range egg
OMEGA 3 fatty acids in pasture-raised eggs are just under 300% more than in a free range egg
OMEGA 6:OMEGA 3 ratios in pasture-rasied birds on a soy diet (8:1) is 31% lower than a free range chicken
OMEGA 6:OMEGA 3 ratios in pasture-rasied birds on a soy free diet (3:1) is 74% lower than a free range chicken
SATURATED fats in a pasture-raised bird (1.28g/100g) is 28% less than a free range chicken
MONOSATURATED fats in a pasture-raised bird (1.78g/100g) is 33% less than a free range chicken
POLYUNSATURATED fats in a pasture-raised bird (1.34g/100g) is 14% more than a free range chicken

The egg layers are moved on pasture every week or every 250lbs of feed from April 1st to November 1st. During the winter they are still on grass and we supplement their fresh greens with fermented alfalfa. We move them monthly and continually lay down hay so the pasture can recover in spring. Oh boy does it ever recover. It is always 6" ahead of the other grass.

We currently have our chicken processed at two different a USDA inspected facilities. The early batches go to Pleasant Valley Poultry in Baltic, OH and the later batches go to Buckeye Poultry in Shiloh, OH.