Like us humans, cavies are unable to produce their own vitamin C so you will need to supply it for them. I recommend that you feed a good quality cavy food with a high vitamin C content, for example, Guinea Pig Museli by Spillers, which I am feeding my cavies at the moment. I do not recommend feeding your cavies shop bought treats as many of these has many additives and sugars in them which are not ideal for cavies, although Excel have recently brought out a range of treats with herbs in which seem to be well-received by my cavies, especially my chief tester “Dandio”. 

Cavies should also be provided with a “cup” full of fruit and vegetables a day, suitable vegetables and fruits are listed below:

Carrots

Parsley

Curly Kale

Cabbage

Spring Greens

Apple (but feed sparingly as it can cause sores around their mouths due to the acidity)

Runner Beans

Corn on the cob (uncooked)

Spinach (not canned)

Cucumber (an ideal “treat” for cavies)

Beetroot (on occasion)

Tomatoes

Pears

Strawberries

As well as the fruit and vegetables listed above cavies also require hay to keep their gut moving and their teeth in trim. I feed my cavies on meadow hay they seem to really enjoy.  I get my hay from my local wholesalers/feed merchants and it is good quality hay, which looks and smells divine, it certainly goes down well with my cavies.