:wave: Hi I'm with you now. Rock bottom, Harmony has a problem of a tendancy to "bladder sludge" or excess calcium in her wee. (I call it chalk cos that's exactly what it is, Calcium carbonate = limescale in a hard water area.)
There are 2 sides to the equation.
a) Rabbits keep absorbing calcium from their diet even when their body has enough, so they have to excrete the excess in their urine. This is why your vet advised you to limit veg & pellets & increase hay.
b) Rabbits have very alkaline urine, which dissolves chalk poorly. So they need to drink well or the chalk crystalises out as "sludge".
European wild rabbits (same as our pets) get all their fluids from fresh grass/wild plants & dew & don't get sludge.
So when we give our rabbits dry grass =hay they need to drink more. Most people in this situation give their buns low calcium fresh veg & herbs, to increase the fluid intake. I don't advise much fresh fruit cos the high sugar content upsets their digestive system.(Exception being a few cranberries which are great for bladder probs)
I suspect that your current problem is that she isn't drinking enough. NOT easy is it?
Second thought. It's
possible that if the urine had chalk crystals in it it would be painful to pass. (humans with crystals in their urine say it feels like weeing sandpaper!) Any PAIN can cause a rabbit's gut to slow down. The rabbit will then try to eat more fibre =hay to keep the gut moving, but tend to cut back on water. This of course makes the sludge worse!!! This
might account for the change in diet.
I'll make 2 suggestions.
If you can get some unsweetened cranberry juice, try adding a
small amount to the water to encourage drinking.
To encourage improved gut function, small packs of strawberry, raspberry & bramble
leaves can be bought. If you can find fresh bramble leaves locally (they grow every where) or fresh strawberry leaves even better & cheaper. Also if you can get some thin apple
twigs for them to eat that helps alot. If your buns go bananas for them it's just what they need to speed up their gut.
The fluid side ain't so easy.
Does that give you something to start on? Please ask me if I haven't explained properly.
I think it would be helpful if you put up a thread asking members with "sludge bunnies" to advise you which fresh foods they give to increase fluid intake without causing sludge. It's not quite as simple as "low calcium foods".
Hope that helps a bit. :wave: