I would just slowly introduce greens, just incase they're new to her. You don't want her to get a messed up stomach from too much of something new.I'll do some more research on what brand to feed, hoping or something Organic or at least non-GMO.
Maybe her previous owner fed a lot of greens, I'm not entirely sure. I know most small owners over feed "treats", using carrots, greens, veggies, as treats. Maybe her owner was one of those.
I read/heard form a few sources that greens were a great nutrient dense addition to the diet, so I plan on feeding dark leafy greens like lettuce, select herbs, etc, but read that Cabbage and Iceberg lettuce are hard on digestion, and don't have many nutrients.
Avoid iceberg lettuce for sure. Cabbage could be used as a treat, but again, slowly introduce everything, one thing at a time.