A. If it is a scratch than I would not worry, but I would check again tomorrow as a urinary tract infection could result in blood in the urine. If you see more blood I would take him in for a urinalysis and physical exam. It is concerning that your dog is not neutered as older male dogs have a much higher rate of prostate cancer. A rectal exam should be done 1-2 times yearly to rule out this contributing to the bloody discharge
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