How are ticks getting on my dog? - Countryside Veterinary Clinic
Fleas are actually in the grass, and you can pick up fleas in the grass, particularly if you're in dog parks. They may be in facilities such as boarding facilities, grooming facilities, and daycares. They may be in a house that you bought. They may be on a dog that came over to your home, including on cats. And when cats go in and out, they can bring fleas in that way. Ticks are outdoors to begin with. They are in long, tall grasses and fields, on the edges of the woods. And so they're out there in the environment, mainly when it's cold and rainy.