Here's why:
* Cleaning behavior: When a female dog is in heat, she often "cleans" herself by licking her vulva. This is a normal, instinctive behavior.
* No transmission of illness: The cleaning behavior itself does not transmit any illnesses. Illnesses are typically spread through bodily fluids like saliva or urine, and even then, they need to be from an infected dog.
* Potential risks: The biggest risk for a male dog around a female dog in heat is the potential for unwanted pregnancy if they mate.
It's important to remember that if your dog is exhibiting signs of illness, it's best to consult with a veterinarian. They can assess the situation and provide appropriate treatment.