One of our rabbits has been straining to urinate for about 4 weeks. We have tried everything at the vets - xrays and medicines but he doesn't appear to have improved that much. He strains to urinate but after managing to go he is fine and eats and runs around as normal. A few times he has been unable to go and the vet has managed to help him to go by massaging his bladder. X rays show nothing. his bladder seems to be fine and he has no crystals etc. He seems to get better but then after a few days he seems to be straining again. We have got him on zantac, lopsicom and baytril. He is also onto Lapizole in case it might be ecuniculi as the vet said that it could be nerve related. He is over 6 years old but very healthy other than this. We largely keep them indoors but they do have an outside run. Any other ideas what it might be?