Answer: Male cats usually have crystals, not a
urinary tract infection, so
treating with antibiotics won't help at all and if you wait too long before having him diagnosed, he may block up and not be able to urinate and then you are talking serious money (anesthesia, hospitalization, sometimes major
urinary surgery, etc), so I highly recommend getting him to your veterinarian for at least a urinalysis
because you are seeing blood in his urine.
Because of these associated conditions,
urinary tract infections in cats usually need to be
treated with an effective antibiotic for at least six weeks.