pellet-less diet

Hi, I’m wondering how many on here have their piggies on a pellet free diet? Mine already get mountains of unlimited hay and 1 cup fresh veggies each per day, alongside small amounts of dried forage. We have already moved away from commercial treats and instead give pea flakes and dried...

I think I may go for a pellet-less in my guinea pig's diet. What Vitamin D supplements are recommended during the winter months? For the spring/ summer/ fall months I've heard outside for just 15 minutes a day will suffice. Are we talking *direct* sunlight? Or just indirect sunlight outside...