My 9 year old fixed male bichon/lhasa mix has started urinating blood on our excercise walk. This is the only time it occurs. It does not happen when he goes out for a yard visit, of course it doesn't happen at the vet, so they think I am crazy. What could this be? I wonder if I should not take him walking with me, but he enjoys it and as he is one of my oldest friends, I don't want to go without him either. He does not have any other symptoms. He does not urinate more frequently, he does not whine or indicate any pain with urination, he does not have a problem urinating on command and when he asks to go outside. There are no lumps, no skin color changes in the torso. There are no changes except this one lone symptom. Because of his advanced age, I am concerned and would like to correct a problem if I can as early as possible. His history is slim. He, of course, had all his shots and they remain current, fixed in 2000, had pancreatitis in 2003, back teeth removed 2006. He has a neurotic licking fixation that has not responded to any treatment. He licks until he bleeds, related to allergies. He has been on everything and despite my pleas for anti-anxiety treatment the vet has done everything but treat the anxiety. Thank you in advance.