I used to feed my bun a max of 6 cups of leafy greens per day. There is another measurement for non leafy greens, i just can remember because i don't usually feed non leafy's. They say 2 cups per 5 lbs of rabbit, or the veggie mound as large as the rabbit. Since Charlie is still a baby, for me, hay is most important. You want a good hay eater as a baby and an adult. So i would keep his veggies to the 2 cups per 5 lb model. That's me personally though.