Hi, I can help you with your question today.
Where did you see the blood in his urine? Did he have an accident in the house?
OK, has he been straining to urinate? Or did he seem to urinate a normal amount of liquid?
Excellent. This can wait until tomorrow. If he did seem to strain without producing any urine, acting restless, pacing, etc, this could be an indication of urinary obstruction. If you see anything like that he should be examined as soon as possible.
In terms of possible causes for the blood,
it could be a simple urinary tract infection, urinary stones causing irritation, or bladder cancer - this is highly uncommon though.
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