Fleas are hard to avoid in nice warm weather when you take your dog out for a walk in the park or you enjoy a camping trip together. Those are circumstances in which you expect your pet to be attacked by such enemies and you might even be prepared and have a treatment at hand in case this happens.
However, the problem with fleas is that they are often overlooked during the cold season, which is actually wrong.
There is a widespread misconception that during the winter, fleas simply cease to exist. These parasites are indeed less active and less prolific during the cold season. This means they do not reproduce as much. Nonetheless, they continue to live during the winter as well.
Fleas feel better during the warm season, as they are able to have a complete life cycle when the temperatures are around 75ºF. Fleas can overwinter on their host or on different surfaces, which means you may encounter them in winter as well.