I've used electronic pest controls in my house for years. Started using them after I had a bad infestation with some previous furbabies. They have worked great for me -- up until recently, I'm thinking they probably need replacing like smoke alarms. They are suppose to help control everything from fleas to mice. And I have had cats in the house with no problem:
here's a link to the type of things I'm taking about
:
http://www.safehomeproducts.com/shp2...st-control.asp
And From their website:
Fleas, ticks and flies do not hear, but ultrasonic vibrations apparently put pressure on their nervous systems, causing immobility.
About Fleas: Fleas are an awesome adversary. Pets are primarily responsible for flea infestations, since fleas live on your pet, in their bedding, carpets and furniture and in the summer, your lawns. Fleas reach maturity in less than 3 months. They are most active in warm weather and climates. They can live several weeks without food and a pair of mating fleas can have several hundred thousand offspring in just nine months.
Fleas communicate by using high frequency sound to stake out territorial boundaries. Weitech Pest Repellers effectively jam those communications causing catalepsy or disorientation. They will drop off pets and bury themselves in carpets where they will eventually die. Vacuum carpets often. Put moth balls or flea powder in the vacuum bag to kill vacuumed up fleas. Use these pest repellers when grooming your pet for added flea control. Allow four weeks for results. Place unit(s) 1-6 feet above floor level in rooms where pets spend most of their time. Continually use Weitech Pest Repellers to control fleas.
Also, found this:
The 3-Step Plan to Natural Flea Control
http://www.allthebestpetcare.com/han..._Flea_Plan.pdf