I am up and awake at work now, so apologies for the delay :)
You do need to exercise caution with the amount of water containing food you give rabbits as they can cause digestive upset and ultimately diarrhoea.
So you should strive for a balance between fibrous foods to encourage teeth wear (rabbits teeth continually grow and it is important they wear down to avoid sharp edges which can injure the mouth) and all round balanced nutrition.
I would aim to limit the grass and veggies, and when giving veggies use things like broccoli, carrots and apple and chard. Avoid high water content food such as tomatoes, cucumber and lettuce.
Supply a daily commercial pelleted ration along with ample hay. Aim to feed the veggie food a couple of times a week.
With time hopefully the appetite will pick up and the transition will work well, it might be a good idea to implement this change slowly.
I doubt the revolution will cause such an effect, reactions to these drugs tend to be quite spectacular.
Other good 'treats' include fresh coriander and parsley.
It is important you observe the faeces to harden. It is normal for the first poo of the day to be a little soft (they usually eat this and it is normal, so you may not see these) it aids gut function.
I hope this makes sense and let me know if you have any other questions, I'm more than happy to answer :)