I've just seen this on the excellent Countryfile program: over 5% of UK farmers are now employing the disgraceful practice of "zero grazing" for their dairy herds.
This involves keeping cows locked up indoors in metal pens with concrete floors for their entire lives, like factory chickens - instead of going out to pasture, they are fed 'high yield' food in troughs.
The farmers blame the pressure from supermarkets, but surely even the most full-on of meat eaters/milk-swillers can see that this practice is simply
plain wrong, no?
More info:
http://www.viva.org.uk/mediareleases/pr2005/05-40milkmyths.htm