One really interesting thing about how fleas spread, or don't in this case, is that fleas DO NOT jump from cat to cat. To better understand how fleas bother cats and humans and how best to combat them, let's discuss the life cycle of a flea. Once a flea jumps onto a cat it stays there for its entire life.

Do fleas jump off their host?

Do adult fleas jump on and off of animals? No. Once an adult has found an animal it can feed on, it will stay there in order to feed, mate and lay its eggs.

Do fleas jump off cats after treatment?

Once a flea infestation has set up in your home, it can take a while to completely clear it. The cocoon stage in the flea life cycle can remain dormant within your home for many months, so new fleas can continue to emerge for months, even after treatment.