
Mmmmmmm,
doesnt sound good, sorry about ur baby bun.
I would take the body to the vets for a post mortem. I had this, it turned out to be Viral Haemorraghic Disease.
As i recall, i had to contact MAFF(now DEFRA), who came and tested all my buns, and unfortunately, i had to have them all pts. (i say all, i had 27!)
It seems from my experience to affect the younger rabbits, if they survive, then the adults are okies, but the babys will die. Do not introduce a new rabbit now, in case ths is what it is!
I hope it isnt though, good luck
Em