Sorry, one more off-topic post if you all can stand it.
I don't always agree with the House Rabbit Society's diet recommendations. I have great respect for the work they do and they have one of the best websites available. But, they also commonly recommend whole oats as a treat (or at least they used to) and I've seen too many problems from whole oats irritating or even migrating into the oral tissues. They also recommend rolled oats at far higher amounts than I would. If they think green beans are too starchy and gas inducing, wait till that bunny eats that nice, starchy rolled oat treat! I suspect we should be more specific about the beans we're talking about. I wouldn't necessarily recommend pinto beans, but green beans are fine in moderation. Nearly any vegetable is fine IN MODERATION!
I think many owners get too carried away and feed a bunch of something without considering that you are never really feeding the rabbit, you are feeding it's gut flora - meaning the microbe population in their cecum, in particular. Rabbits get only a fairly small portion of their total nutrients from the stomach, it's much more from volatile fatty acids (VFA's) from fermentation in the cecum that is absorbed directly across the gut wall. Many of their vitamins come from eating the cecotropes or "night stools".
I also have always disagreed with the amount of pellets they recommend. I start limiting pellets at a younger age for most breeds (larger breeds can have higher amounts longer as they take longer to grow to full size). If they specify grass hay based pellets, the volume they recommend might be tolerable, but if most rabbits are fed that amount of alfalfa based pellets, they would have major urinary tract and dental problems within their first 2 years, not to mention obesity. I (and most other exotic experienced vets I know) recommend only 1/8 cup pellets per 5# of rabbit body weight per day. I think I first heard this at a conference from Francis Harcourt Brown's talk and I consider her to be the top rabbit medicine expert in the world. Don't hold me to that, it's been a LONG time that I've been recommending the lower amount of pellets compared to HRS.
I also recommend less veggies and much less fruit per day. Most rabbits must be pushed to eat enough grass hay to keep their gut and teeth healthy over their whole lifetime. If they are fed the amounts of veggies recommend by HRS, they will NOT eat enough hay. I would rather they get more leafy greens and WAY less veggies.
I know you don't have any reason to take my word over HRS, but I used to work at a clinic where myself and an associate saw around a dozen or so rabbits per week at least, along with Guinea pigs, chinchillas, and what ever other small mammal you want to mention. I saw around 70% exotics, at that clinic, admittedly mostly parrots/birds.
Sharon Hollars, DVM - feel free to google me. I haven't checked lately, but I used to be mentioned on a few exotic forums as a recommended vet. I guess I better go check![/I]