I think most piggies LOVE bell peppers, so I'd definitely recommend adding them to the diet to avoid scurvy. If you have trouble getting them to eat them though (One of my pigs refuses to eat them for example) the oxbow vitamin C treats are great!
Also, a lot of people have trouble with romaine lettuce (i believe causing bladder stones?), so I would recommend switching to red or green lettuce!
^ This is all stuff I've learned in the last couple months lol, so if I'm wrong about anything someone please correct me :)
We then supplement it with Radicchio, Dandelion, Kale, Parsley, Cilantro and when we can get them Endives. Plus Cherry Tomatoes and Red pepper. They also occasionally get Blueberries, Apple and Watermelon. Occasionally they may get "Spring Mix"
They weren't too keen on Chard or Collard Greens.
You can see at a glance why fruits are only recommended as treats (high in sugar) and find what vegetables will provide (on average) the most vitamin C per calorie (if vegetables are fresh).
By the way, does anyone feed their guinea pig purslane? I did not know what it was until I looked it up and found out what a nutritious weed it is. And I also noticed this was a weed I was trying to get out of of the garden! (p.s. the chickens don't seem to eat it - it is okay though). And imagine my surprise to see I had included it on the chart page (!) [google told me].
It is fairly tasty, has a perfect calcium/phosphorous ratio, and is high in many other vitamins and minerals - and has a decent amount of vitamin C.
One of my new, favorite sites:
Eat The Invaders!
(this page may have slightly different data on purslane - I am probably using an older USDA dataset than they are. I also use 10 calorie amounts rather than 100 gm amounts).
Yep I had picked up on that based on yours and others comments in other threads.
Will have to rethink some of their diet based on what the local store has available.
We are already avoiding Romaine, so need something else we can add to the Escarole and Red Lettuce as the staples.