Is prevention needed all year round?

I do believe so. Although we do have a lot of clients who say that there aren't any fleas and ticks at home that they can see, sometimes the fleas do kind of track on those shoes and when we come into our house, they can also be there. Some of our clients have dogs as well as cats. And even if their cats are indoors almost constantly, sometimes the dogs can bring in the fleas and ticks as well.

Yes, prevention is needed all year round, especially in areas where it doesn't get cold enough to kill off fleas and ticks. Even during the winter, warm days can cause these parasites to become active again after being dormant during colder periods.