I understand, but I think these cats are ones that she just recently decided to adopt and are mostly outside. I didn't remember her saying that the fleas were in the house. I was just mentioning the capstar as a way of getting rid of current fleas in addition to the other treatments that were already mentioned. I apologize for not stating that the capstar was only for live fleas for immediate use. I had just remembered about it and was leaving the house a few minutes after that post. Thanks for the clarification.