Joseanne
Yes, and no. I think it's all to do with whether farmers fatten the animals up with grain at the end purely to get a better market price for them.
In the West Country, and no doubt elsewhere, we have stickers on meat which say "Pasture for life" which means ALL their life. It's on packs of butter too.
DH, a bit of a food connoisseur, always seems to think the 100% grass fed meet actually tastes different.
Most beef cattle are at pasture during the summer and housed in yards during the winter very few would be “pasture for life”
Some are fattened outdoors on grass plus extra rations, grass is high in protein, good for growing, extra carbohydrate to finish an animal properly is needed. This may be grain or maize silage or several other feeds, often mixed together to give a “complete diet”.
It’s easy to tell if an animal has been fattened at grass, the fat will be yellow rather than while, do they taste different?, that’s difficult to prove because so much depends how the butcher keeps the meat and on the cooking.
We had 8 of us to dinner party on Sunday, Ribs of Beef from my favorite butcher, cooked to perfection of course, a rare luxury.