Infection or Liver Problem?

Question
Before Xmas I took my rabbit, Jasper a standard size rex to the vets. His tail was wet and I originally thought this was because of the wet weather, but I noticed he was now longer using his litter tray for wee or poo. The vet said Jasper had urine burn and possibly cystitis or a similar infection. I was giving a healing cream and baytril. Over a few days he started to eat less and less until I took him back, the vets gave him the injection to help start his digestion.  This didn't work, the 2nd time they tried the same with a painkiller, this stabilised but didn't increase his appetite. On the next visit the vets took him in over night to give him some fluids through iv. He reponded well to this and came home the next day. However he still doesn't have the appetite he had prior to me noticing his wet tail, plus ever since this started he no longer wants to go out on the garden, infact he doesn't even want to leave his hutch to roam the shed where he is kept.
Originally I thought it could be that he was stressed, depressed or perhaps E. Cuniculi so I requested the vets take a blood test. The Biochem has come back with what the vet says could indicate liver issues and the Hematology results have come back with raised white blood cells, i am still awaiting the EC results.
Before the blood test results came back I was given metacam and now after the results another antibiotic and I am hopeful that these will help! However the vet mentioned that if he doesn't start eating more and still doesn't seem himself to go back. (the vets weighed him and he's put on around 100g since before he was taken in over night, he now weighs 3.1kg).
I asked the vet if xrays may help. He said it would mean putting him under anaesthetic to take an xray but they do have an imaging technique that they could use instead. The vet did say however that everything may be so small that they might not be able to see anything. I kind of got the feeling from him that he wasn't keen on trying it. Is a rabbit's liver that small that it might not show up, is there that much difference between the size of a cats organs and a rabbits?
Could the liver readings from the blood test be becuase he's still not eating as much? It's almost as if he's eating just enough, but he's only really eating what we used to give him at night, without all of the lovely green grass he used to help himself to everyday.
Sorry about all of the questions but he's my 4th rex, but the first one who has me stumped on a help problem. Oh and his teeth have been checked and they're all fine.

Answer
Dear Donna,

A chronic infection can cause liver problems, so I agree with the vet to stay on the antibiotics, and possibly even try an additional antibiotic if the Baytril isn't doing the trick.  The problem here is that there is no obvious infection, so nothing to culture.  And there's no guarantee that a x-ray pic would show anything unless there are major abscesses in the abdomen or thorax.  Even if such things did show up, it wouldn't change the treatment, so again I agree with the vet to take the more conservative course, not stress bun with anesthetic, and stay the course.

Is his temperature normal?  Please see:

www.bio.miami.edu/hare/sickbun.html

The vet sounds very experienced, so I'm assuming that not just the incisors but also the *molars* have been checked.  Spurs can be a source of stress that can cause immune system suppression, making the rabbit vulnerable to other problems.  So just to be sure, ask the vet if the molars were checked, too.

I hope the two antibiotics he's on will help, and he'll gradually get better.  There could be an abscess somewhere, and these will take longer to heal than some other types of more antibiotic-accessible infections.  Sounds as if all the right things are being done, and time will heal.

I hope this helps set your mind at ease.

Dana