I know it can be a bit confusing for anyone new to this. Everyone has a differing opinion on the greens, and most other things really. I've found that I take more into account, with opinions where several others say something similar and because it's what they've learned through personal experience, not just because they read it somewhere. But also weighed by what actual scientific and medical sources say, as well as what my own experience has been with my own rabbits, and the trial and error I've gone through with them.
I've encountered all sorts of different issues over the years. The most complicated being a few rabbits with megacolon. A lot of what I learned about sensitivities of a rabbits digestive tract and finding the right balance in the diet, was with them. Because of their condition they had to have a very specific diet, which took some trial and error on my part, until I found the right balance to keep them as healthy as possible, for as long as possible.
And just to show the importance, especially to rabbits that may be more prone to being sensitive. With my first megacolon rabbit years ago, I had no idea that anything was really wrong because I didn't really know a whole lot back then. And then it was too late and she passed because of dietary sensitivities and the sudden introduction of a new food causing stasis. So, for some rabbits these dietary recommendations are extremely critical.
For your rabbit and the greens amount, if you're feeding pellets, it's not such a big issue, as they get the needed vitamins from those. But if you're feeding a very reduced portion of pellets or none at all, then the veggies will be a more important part of the diet. I personally don't worry so much about the amount and just feed the amount and type that I want or feel/learned is best for my rabbits, based on their poop and urine output, weight maintenance, and if they remain healthy on a particular diet.
With new foods and what types to feed, the important aspects are the gradual introduction and not feeding an excess of high calcium veggies, especially if a rabbit is having a lot of calcium sediment in the urine, or thick creamy/gritty urine(a whole other health issue). I don't emphasize this just because some of the sites say this. The links I include in a post are for the most part, because it has info that I agree with because I've learned it's true through my own experience and experiences related by others, that are first hand accounts on here or other sites that I've looked at. So it's seeing what has caused problems for my own rabbits and what's helped, and what problems others have had and what's helped their rabbits.
Like gradually introducing new foods, especially high carb/sugary foods. I've learned that sometimes foods introduced too quickly with some rabbits, can cause issues. In particular, young rabbits with sensitive digestive tracts, who can even develop fatal enteric disease when this happens.
Now you may be lucky and find your rabbit is one of those with an iron gut, that nothing upsets. They're out there. I used to have a rabbit like that who could eat anything at any time, and never had an issue. She lived to be 10 and never had an episode of GI stasis. But because there are many more rabbits sensitive to changes and certain foods, slow food introduction is always the general recommendation I give here. That way if a rabbit does have a food sensitivity, then only a small portion has been introduced and so minimal upset will occur, and you know to remove that food from the diet. And the gradual introduction gives rabbits that are more sensitive to changes, time for their digestive system to adapt and acquire the microflora needed to process that new food without resulting in digestive upset.
The exception to gradually introducing food is with grass hay. Most grass hay varieties almost never cause digestive upset or issues. The rare cases I've read of involved rich early growth fresh grass and grass hay(too rich for some rabbits), grain hays with the grain still in them(too many carbs), and hay that has spoiled(makes rabbits sick). I would say grass(fresh or dried hay) is the most important aspect of a rabbits diet. The amount consumed and the balance of protein and fiber to help regulate weight, nutrition, and gut motility.
And all of this is from my experience and what I've learned having rabbits for the past 20 years. Some things you'll just learn by experience with your own rabbit, and what diet works best for her. For her, the sudden change from muesli to a healthy pellet was good and worked out. For other rabbits, to suddenly remove the muesli from their diet, even if it is unhealthy, and switch to a new less tasty but healthier pellet, may cause them to just stop eating and end up in stasis.. It actually happens pretty frequently. So it's going to be different for every rabbit and every situation. But the general recommendations are there for the rabbits that it may be an issue for.
With knowing if a particular diet is working for a rabbit, monitor droppings, urine, changes in eating, body condition/weight, and for unusual changes of behavior. If you find irregularities or unusual changes, then it can be a signal a certain food is causing an issue.
https://bunssb.org/bunnies/guide-bunny-poops/
https://wabbitwiki.com/wiki/Urine
https://wabbitwiki.com/wiki/Anorexia_and_pseudoanorexia
I ordered this to try and it will arrive tomorrow:
