"This worked really well on my cat for flea relief. She had become a little lethargic from the flea bites. After the product dried she was perky again and had no fleas. It smells great and isn't harmful to your pet! The only downside is that it is oily. I recommend a through brushing when it is mostly dry. Otherwise it could mat the fur, especially if you have a long haired cat like mine. but on the plus side of that the Oils made her fur shiny and soft. Although I don't know if this can be your only flea defense, It works for immediate relief, and for bedding."