The most common cause of hematuria is disease, mainly urinary system disease, kidney, bladder, urethra inflammation or disease when there will be hematuria. The most common cases in female dogs are cystitis, bladder stones, and kidney damage. In male dogs, it is mainly the collateral damage of estrus, urethritis, cystitis, and hematuria caused by bladder stones. The dog has hematuria but the mental state is very good, may be caused by transient bladder inflammation, the clinical cure rate is high, to take the dog to a professional pet diagnosis and treatment institution in time to check what is the cause of hematuria, to avoid misdiagnosis or aggravation of the disease because of neglect.