Rabbit X-ray, what's causing the thickness in the bladder?

[rebeccalyn7]

Pepper is almost two,
Had gut stasis for a week or so,
Now she's fighting something in her bladder, vet has no idea,
I need to know what this is.

 

[JBun]

A rabbits bladder wall can become thickened due to irritation or infection, such as from bladder sludge or a UTI. Has your vet ruled those out?

Here are a few references to it:
Bladder stones/sludge-
"The bladder may be small and thickened, or an abdominal mass may be palpable."
" the wall of the bladder was thickened and the mucosal surface was marked with fine paintbrush haemorrhages"
http://wildpro.twycrosszoo.org/S/00dis/Miscellaneous/Urolithiasis.htm

http://wildpro.twycrosszoo.org/S/00dis/Miscellaneous/Cystitis_Ele.htm

You see the best rabbit vet for your area don't you? Could they consult with a specialist?

 

[rebeccalyn7]

I don't think she has sludge, her pee is still normal color.

My vet was a bit unsure,
Might have to get a second opinion,
Don't want her to leave me