Apple cider vinegar and lemons are good ingredients for a homemade flea repellent. Make a solution with equal parts apple cider vinegar and water, or create a mixture by boiling sliced lemons and water. Then, fill a spray bottle with the homemade solution.
These ingredients are natural and safe for pets. Fleas do not like vinegar or lemons, so solutions using these components work well at preventing flea infestations.
A homemade flea repellent collar can also keep fleas away from pets. In order to make one, add two to three drops of lavender oil on the pets current collar. Homemade flea repellents work best when used with good cleaning and bathing practices.