Consuming sucrose or a mixture of glucose and fructose, when added to natural-ingredient diets at concentrations equal to 20 percent of energy, led to equal growth rates (6.6 g/day; Ahrens et al., 1985). The guinea pigs' protein requirement for growth depends on the nitrogen source in the diet ...
- Offer good-quality grass hay (such as timothy or orchard grass) as the main food in your guinea pigs diet. Hay is best offered in a hay rack to keep it clean and dry. Chewing on hay not only will help wear down your guinea pigs continually ...
Good-quality hay should make up most of your guinea pigs' diet, and they should always have it available to them. They should have fresh grass as often as possible too, ideally every day.

The best diet for pet guinea pigs is unlimited hay &, grass, plus a small daily amount of guinea pig pellets and fresh food. You may also want to give your guinea pigs daily vitamin C supplements.
- A diet high in fresh hay and plenty of fresh water are paramount to preventing urinary issues in guinea pigs.

The preferred basic diet for guinea pigs is unlimited amounts of timothy or other low-calcium hay, supplemented with smaller amounts of commercial, high-fiber, timothy-based guinea pig pellets.
- I think if you are feeding them fruits/veggies high in water content (like cucumber) they should stay adequately hydrated! Its funny, my one guinea pig that sadly passed recently didnt drink too much, but the one I just got drinks like crazy! I think its because the other one loved cucumber so much which has a lot of water!

Find out what foods guinea pigs can eat, how much feeding hay they need, and the importance of vitamin C for guinea pigs.