There is two types, acute and chronic.
Acute - This is when it can happen suddenly as of the accumulation of toxins in the kidney's, or it could be as a result of an electrolyte imbalance.
Chronic - This is when it progresses slowly, it can take over several months.
Here is a list of the symptoms which your bunny may have:
- Unable to eat
- They have a fever
- Lack or inability to produce stools
- Heart complications
- Painful or tender kidneys
The causes of this can vary, acute can happen from shock, trauma, stroke, extreme stress, heart failure or blood infection.
A urinary tract obstruction or infection which has spread to their pelvis, can cause either form of kidney failure in rabbits. Some other common causes are ageing and diabetes.
If they have the acute type, then they may need to have immediate fluid balance therapy which should prevent any more injury from happening. The vet will tell you what you need to do and if you need to feed them anything in particular. They may also provide a medication.
After this you will need to make sure they have lots of rest and and a good balanced diet. Make sure that they are having plenty of fluids and I have heard green vegetables are good fr helping them as well. But before you do anything, check with you vet.
I hope this post on kidney failure in rabbits helped.
Have a look below if you are interested!