Dark orange to red pee in itself is not indicative of a diet too rich in calcium unless the pee is thick and white and has reddish-orange pigments in it. Bunny pee comes in a rainbow of colors. Red nuances are often due to plant pigments, but the bunny body may actually produce the red colorant spontaneously. Article on red bunny pee: http://www.rabbit.org/journal/3-1/red-urine.html

Here is a table with nutritional values of many rabbit pellets, you might be able to find a type with the calcium content that you want. Pellets kind of ensure that a picky bunny gets every nutrient they need that doesn’t come from hay. It is really great that she’s a big hay-eater since hay is the best bunny food. http://www.therabbithouse.com/diet/rabbit-food-comparison.asp

It can be very difficult to make a bunny eat what it doesn’t want to eat. You often have to try the same new veg many times before the bunny decides to try it. Bunnies learn what is good food from the mother’s milk, which has taste-molecules in it from the food the mother eats. It’s of course very important for wild rabbits who must be able to tell what’s ok to eat, since obviously, very many plants are very poisonous. This may be why it is so hard to get a bun to try something it’s not used to.

Sounds like my girl; Treasure. She wouldn’t touch anything but her pellets and hay. I keep giving her different types of veggies but he little sister March just gobbles them up before Treasure can really try them. But finally FINALLY I got her to try some kale and she actually likes it! I guess theres just not much you can do about a picky eater but as long as they eat the hay I think they should be alright.

I was reading up a bit on kidney/bladder-stones on Medirabbit, and found this warning about feeding too LITTLE calcium, came to think of you:

“In an attempt to reduce the calcium intake, it is sometimes advised to feed a low-calcium diet and/or stop feeding pellets. This is not advisable. Indeed, rabbit have teeth that are growing continuously, and thus need a daily minimal supply of calcium through their diet.
A diet low in calcium or devoid of pellets can lead to mineral and nutrient deficiencies.”

Full article: http://www.medirabbit.com/EN/Uro_gen_diseases/Mech_diseases/Urolithiasis.htm

There are pix in the article of healthy/unhealthy rabbit pee, so I think you should read it and compare to what your bunny’s pee looks like. They should shed calcium in their urine, it’s a peculiarity of rabbits to do that (most other mammals shed excess calcium via the feces) and it doesn’t mean there’s sth wrong.