Here's how you can prevent viruses carried by mosquitoes:
Domestic animals, including dogs and cats, are at risk for some types of encephalitis, including West Nile Virus. Dogs are at a higher risk than cats, and horses are most at risk. Pets can't transmit the disease to their owners or to other animals. If you suspect an animal has encephalitis, contact a veterinarian immediately. Most likely it will recover from the disease.