Did you cut out the pellets?

Did the vet do a blood test to see how high Oxo’s blood calcium level was?

I suggest you read this article:

http://www.rabbit.org/health/urolith.html

I think you’ll see that they don’t really consider these greens to be such a culprit and that also exercise is important and this can help increase the water intake as well.

I think the article will help you when you go back to your regular vet. Most vets will verify this with an x-ray, bloodwork, and urinalysis. Doing all of those is costly though so I would start with the x-ray and urinalysis – the sludge will show up on the x-ray.

Most vets in the US who would suggest cutting out the pellets first and foremost as those are higher in calcium and more concentrated.

I think green lettuces like romaine and green leaf and really most other lettuces would be fine as well.

I think some rabbits are just predisposed to sludge – I’ve had about 4 sludgy rabbits and the rest were fine – all on the same diet. Also age and activity level are a cause.

I’m with Sarita on this one.
I think before we panic get the urinalysis done, rabbits naturally have high % of calcium in the urine and many seem to be pre disposed to sludge (though it may never form into crystals/stones). I’m just not sure ‘feeling’ the bladder for sludge would be enough to diagnos this is a problem.

Stick to your regular diet, maybe take out the Kale and lessen the pellets (or look at the calcium % in it and decide if you should try another brand). The biggest thing I think is make sure he’s drinking enough, and if not syring some water into him if you have to. If he’s not a big mover, try adn get him up and moving around everyday.
Definetly talk to your regular Vet, ask lots of questions.

I have (and had) Rabbits with sludge, so far it’s not been an health issue and only recently has one had infection in the bladder and sludge at the same time.

What exactly is sludge? What are the symptoms?

What about dandelions ? They are very healthy and even if they contain quite a bit of calcium it is a diuretic herb. So the idea here is that your bunny will have to drink more because he will pee more. Basically it will move more fluid thru him and that’s what you want ? This is just an idea but someone else will have to confirm if its a good one or not.

PS Healthy for a bunny and a human

Sounds like you got the veggie thing under control! Sometimes they just refuse a new veggie for a few times but then will eat it later…after you’ve thrown a bunch out
Based on what they like though-and what you said you tried…might I suggest red cabbage, radicchio, bok choy (or other chinese greens) and cilantro, carrots tops? They might be close enough to what they like, but different enough to get him munching veggies more?

The other thing for hydration-I believe you said you were seeing a specialist so perhaps this is best to ask the vet about first-maybe putting diluted pedialyte or fruit juices (apple) into the water to encourage more drinking?

Yeah, sometimes just clean fresh water is the trick with no additives.