shoo!bug is an amazing product that uses a frequency barrier to repel bugs from animals and people. It really works well. I have tested it on myself and my dog - no fleas (on him) or gnats near me. And the company is very "green" in their business practices. Learn more about shoo!bug when you listen to my interview with Melissa Rogers. Go to Pet Life Radio and click on the icon or link for Best Bets for Pets.