Well, the cat flea can jump onto a person and bite the person. The person can then walk into her pristine home and the flea will jump off the person into the carpet. From there the flea will jump onto the indoor cat within 24 hours. The cat has a flea. If there are a male and female fleas they’ll mate and produce a couple of thousand offspring in months. The cat flea is a massive jumper. They can jump through doors and windows. Guests can bring them into your home.