Here is a list of veg and what quantities to feed:
http://www.theguineapigforum.co.uk/showthread.php?t=42
- Unlimited hay (up to 80% of the daily food intake to keep the back teeth ground down and the guts going)
- Pellets (preferably to most muesli mixes): topped up until 6-9 months old, then slowly reduced to the 1-1/2 handful per piggy per day that mature adults need from 12-15 months onwards.
- 50g/1 cupful of veg per piggy per day of mixed veg; ideally you include one high vitamin C veg once daily, i.e. a slice of (bell) pepper of any colour, a bit of broccoli or some fresh parsley, dill, coriander/cilantro.
- fresh water daily; please do not put additives in as you can't control the intake and the water tends to go green very quickly