Well, they will if you let em,eat anyhing, we let our saddlebacks loose in the patch to clear it. Waste of time, more intersted in wandering around the garden playing with the chicks and ducks. However we know they love Chard and beetroot and is full of flavour, small swedes and parsnips are good. Hope this helps but if you are like the rest of us you will spoil them with allsorts. Also have a word with local grocer and see what they do with their waste/damage out of date stock you may get a good supply.
Enjoy!!!!