Is it true if chihuahua pees a lot she is going to have her period?

Increased urination in a female Chihuahua could indicate she is in heat, but it is not a definitive sign. Other factors, such as urinary tract infections or changes in diet or water intake, can also cause frequent urination. If you suspect your dog is in heat or experiencing any health issues, it's best to consult a veterinarian for a proper assessment.