Here's why:
* Possible causes are numerous and can be serious: This could be due to a variety of issues, ranging from minor anal gland problems to life-threatening conditions like tumors, parasites, or injuries.
* Prompt veterinary care is crucial: Only a veterinarian can properly diagnose the cause of the bleeding and provide appropriate treatment.
Please take your chihuahua to the vet as soon as possible. The faster you seek professional help, the better the chances of a successful recovery.