Fleas and ticks can cause discomfort, itchiness, allergic reactions, and can carry more serious diseases with them. The chance that your pet may get fleas or ticks depends on where you live and the environment around you. Fleas thrive in warmer weather, but may go dormant during the winter in colder areas. Ticks tend to live in wooded areas or areas with high grass. You should keep your pet away from areas like this, but if they do go exploring, you should check them for ticks and fleas after.