There is no special food you should feed your rabbit if its urine is orangey-brown: either your rabbit is sick, or it isn't, but you should continue to feed it the normal healthy diet.
More information:
No matter what is wrong with your rabbit, you should always let it eat because rabbits can't safely fast like dogs, cats, and humans can. Fasting and other disruptions in normal diet is dangerous for rabbits and can make them very sick! Adult rabbits should eat lots and lots and lots of hay every day, some pellets, some dark leafy greens, and water.
Healthy rabbit pee can range in colour from clear, to light yellow, to bright orangey-red, to dark rusty brownish-red ... really a wide variety of colours! The reasons the colour changes is based on what food they've eaten recently, the weather, if they're stressed out, if they're dehydrated, etc. No matter the reason, if the rabbit is healthy, the colour will change soon. Colourful urine does not necessarily indicate blood.
If you're concerned about your rabbit's health (no matter the reason), look for common signs of ill-health. (See the related question below for details.) If you see any signs of sickness, bring the rabbit to a vet. If the rabbit seems perfectly healthy, then make a note of whatever it is that worried you, and mention it at your next regular vet check-up.
If you're concerned about the colour of your rabbit's urine:
Rabbit urine can vary widely in colour from pale yellow, to orange, to bright orangey-red, to dark rusty red -- this is normal and natural. It's a simple internal reaction to the foods they're eating, how much water they're drinking, and/or hormone and stress levels. However, orange or red urine can also be a sign of blood in the urine. If your rabbit has bloody urine, it requires veterinary attention as soon as possible, from a special "rabbit-savvy" vet. Bloody urine could be caused by ovarian cancer, a serious infection, a kidney stone, an injury, or something else. If you aren't sure if your rabbit's orange urine is from blood, have it pee on a white towel. (Remove the litter from the litter box and put in the towel instead.) Wait for the towel to try. If the orange colour is spread evenly across where the pee soaked the towel, that means there's no blood. If the orange colour appears in spots on the towel, that's blood.
No
It's not normal for a rabbit to have blood in its pee. There might be lots of reasons why your rabbit has blood in its pee: urinary tract infection, ovarian cancer, or an injury (maybe the other rabbit hurt him somehow down there), or something else.Sometimes rabbits have orange, brown, or red-coloured urine, and it doesn't mean there's any blood. Rabbit urine can range in colour for many reasons, like dehydration (always make sure rabbits have access to water changed fresh every day; if the rabbit isn't drinking, that's a problem), or something stressful happening to the rabbit, or different foods the rabbit eats (like if you feed it too many carrots), etc.If your rabbit has bright or dark-coloured urine, you should look for other signs of ill-health in your bunny, and learn about how to care for rabbits to make sure you're doing the right things.If you think the rabbit might be sick (including possible blood in the urine), the best thing to do is go to a veterinary doctor who has experience and knowledge treating rabbits. See the related questions below for details.
It doesn't.
pee
popppopopopoppopopoppopoppeee
Nevermind. Hot pee isn't a symptom of sickness or anything. It's just warm.
most likely dry pee
She likes to pee on the fire hydrant.
No, orange pee isn't exactly normal. Green pee is when you don't have enough to drink when you empty up, as is yellow. Clear pee is what you want (it means you've drank enough). if you want a better answer then ask a doctor. :)
its your own blood mixed with your pee
Go to the doctor...?