Just to let you all know that all is happy in the garden again. They're eating everything now spuds, turnips (cut into little squares), vegetable shavings, Rolled barley/oats and distillers. I made up a porridge for two days, of the above ingredients, and I think that it helped them make the transition (they loved it).
In the space of about a week they have turned the old overgrown vegatable patch into mud. My wife is so impressed she wants to move them little by little to areas of the garden we never got around to last year. If i'd known that they were natures bulldozers i'd have got them last year instead of a plough! what absolutely incredible animals! Thanks for all the advice, it helped loads.
Morgan