Everything I've read says buns should be fed twice a day. I just give my guys a pile of veggies and they end up grazing all day... they'll eat some and then take a nap or a bath and then eat a little more. They get unlimited timmy hay and fresh veggies both in the morning and evening; then every other evening they split about 2/3-3/4 cup of timothy based pellets between the four of them. For several years they didn't get any pellets, but then Velvet started losing weight for no apparent reason so I started giving him pellets and his weight is back up and he's acting just fine.... I add a very small piece of fruit about every 4 days or so as a treat.

My vet calls bunnies Eating Machines