Can you tell me more about it? I would prefer pellet free way too since I feel that pellets are not a fresh food and not optimal for their health. They are mostly hay anyway. Vitamin C is in every veggie and green, so if we feed them fresh a lot, there should be a lot.
I feel the key to a pellet-free diet is variety, personally feed two different kinds of lettuce daily (normally oakleaf and one of the heirloom varieties I grow in my garden), capsicum/bell peppers, and then four other vegetables which varies depending on the season.
Keep in mind I live in Australia so it is currently autumn, here as some examples of what I feed.
Tonight I will feed oakleaf lettuce, red velvet lettuce (from my garden), red capsicum (from my garden), snow pea leaves and pea pods (from my garden), mizuna (from my garden), sweet potato and sweet potato leaves (from my garden), and tomato (from my garden).
Last night I fed oakleaf lettuce, tennis ball lettuce (from my garden), green capsicum/bell pepper (from my garden), mung bean sprouts (sprouted myself from seed), celeriac, wombok (from my garden - may cause gas), and zucchini.
The night before I fed red oakleaf lettuce, cos/romaine lettuce (as none of my pigs have calcium issues), purple capsicum (from my garden), kohl rabi leaves (from my garden - may cause gas), fennel leaves (from my garden), carrot, and cucumber.