The life cycle for ticks goes from adult to egg, larva, nymph, and new adult.

The life cycle for fleas goes from mama flea to eggs, larva, pupa, and adult flea. This process takes about a week.

Yes, because they're all going to go to whatever is the most available food source. If you bring in a stray cat with fleas and you have other pets that you haven't had on flea prevention, it won't take more than about three days before everybody is infested. They can also affect people, but humans don't have a lot of hair, so we don't have a whole lot of ability for them to create skyscrapers on us.

On a cat, fleas will live anywhere, but you're most commonly going to see them around the neck, at the base of the tail, and on the belly. They like the areas that are not easily exposed to biting and scratching for obvious reasons.

First and foremost, fleas are insects, while ticks are arachnids, so ticks are cousins to spiders. The big difference between fleas and ticks is that fleas will build cities and skyscrapers on your animal, and ticks will not. The life cycle of a flea consists of finding your pet, biting your pet, eating your pet, laying eggs, the eggs hatching into larva, the larva turning into pupa, and the pupa turning into adults, perpetuating the cycle. Ticks' life cycle actually happens off of your pet. They only feed off your pet, and after they're done eating, they drop off and continue to propagate and wait for something else to come by.