As for meat I buy "grass-fed" when it's available, but the problem is that there's no certification process for what grass-fed means. They could be eating -some- grass, but getting the majority of their intake from corn for all I know.
That's an issue i'm having, too. Even the famed 'Aberdeen Angus' beef isn't 100% grassfed. I really like Aberdeen angus steaks as well. Can't wait to one day try true grassfed beef.
I don't think it would ever come from a big farm/business/supplier/whatever. It would be a small farm/business/whatever. Breeding cattle on 100% grass would just see you getting priced out the market and, as far as I am also aware - have less production overall, and less often.
So, where the hell do you find these grassfed animals? I've still to find out. I WILL find some, though. One day....
There's loads of organic farms round the central belt that'll deliver grass fed organic beef to you. Problem is it's super expensive. They do veg and dairy too