A LOT, for sure!! It's been awhile since I've only fed one at a time, as for the past 8 weeks, my doe has kits and then they're eating on their own also. I don't think she's nursing anymore.
I'm convinced I don't have rabbits, I have PIGS!! They're oinks. Unlimited timothy hay. Pellet wise, I fill their J feeder a couple times a day and it holds 6-7 cups of pellets, but that's for 7 growing Flemish, not just one. They also get their salad/treat dishes once a day, tupperware containers about 2" deep. In it is oatmeal, BOSS (black oil sunflower seeds), calf manna, flax seed, oats, mix of greens on top, kale, romaine, parsely and cilantro, plus carrot chips and topped w/ applesauce. Yeah, they eat better than I do!! LOL
Hope, my doe, LOVES applesauce... she'll lick it all off before ever eating any of the greens it's on. She's a very dainty eater, but she can sure pack it in. Her kids seem to like it also. They also get a few apple slices a couple times a week.
Favorite color... light gray, what I have, but I also like steel and blue.