Its a complicated one. My dog started urinating dark blood 3 weeks ago. Out of the blue. No other symptoms whatsoever other than red urine. He first went to the vet and she checked his prostate, checked his urine's pH etc. NOT for crystals. Sent us away with antibiotics. It didn't clear up, so they then checked his Urine for crystals, no crystals were found. He went under and they took a sterile urine sample, x-rays, inflation, of his bladder, ultrasound etc. They could not see any abnormalities, and his urine culture came back as normal as well. No infection or abnormal cells. His urine has changed to yellow randomly, but then goes red again...
Now they want to check his blood for clotting issues, if they cant find anything he will have a IVU with a specialist...
Have you come across a complicated one like this? He does not strain when he urinates, he is not urinating more frequently either. I have a feeling it is a kidney issue... Any ideas?