You should immediately contact your veterinarian. Blood in the urine (hematuria) is a serious symptom that could be caused by a variety of factors, some of which require urgent medical attention.
Possible causes of hematuria in dogs include:
* Urinary tract infections (UTIs)
* Kidney stones
* Bladder stones
* Tumors
* Trauma
* Certain medications
Your veterinarian will be able to:
* Perform a physical exam
* Collect a urine sample to test for infection and other abnormalities
* Run blood tests
* Perform imaging studies (like X-rays or ultrasound) to look for stones, tumors, or other problems
* Determine the underlying cause of the hematuria and recommend the appropriate treatment
It's crucial to take your chihuahua to the vet right away, as early intervention is key to a successful outcome.
Please note that this is general information and should not be considered a substitute for professional veterinary advice.