Hi!
Guinea pigs need these food percentages for a balanced healthy diet (and sorry, I don;t break them down into their constituents):
- up to 80% of the daily food intake should be hay for good gut health and to keep the crucial back teeth ground down evenly
- 10-15% should be a mix of fresh veg and herbs, preferably containing one high vitamin C veg or herb each day, like a slice of pepper, a sprig of coriander/cilantro (those two can be fed daily), a sprig of parsley, dill, mint or basil or a floret or chunk of stem of broccoli. Please feed tomato or any fruit no more than twice a week. Cucumber and celery chunks are other veg that can be fed daily, the other I would rotate and feed 2-3 times a week. Feed high calcium veg like spinach or kale only occasionally.
- 5-10% pellets (no dry mix/muesli that encourages selective feeding which can cause long term teeth and gut problems). Start gradually limiting the amount of about 40g after the first quick growth spurt is slowing down from about 4-6 months old. Adult piggies over 12-15 months old need about 10-20g daily. Weigh weekly.
- fresh water without additives daily
https://www.theguineapigforum.co.uk...veg-and-fruit-list-with-vitamin-c-grading.42/
In terms of pellets, you are looking for preferably high fibre and low fat and calcium ones that don't contain molasses.
Please stay off any shop treats that contain fat/seeds, sugar/honey/molasses or dairy products like yoghurt.