Kill deer ticks on wild mice. Mice are the primary carriers of Borrelia, the bacteria that causes Lyme disease. Deer ticks become infected when they feed on the mice. Soak cotton balls in a liquid pest control product containing the pesticide Permethrin, a toxic chemical that kills deer ticks without harming their rodent hosts. Allow the cotton balls to dry and place them in outdoor sheds and other areas that mice frequent. The mice will use the cotton as nesting material, and the chemical in the cotton will kill the ticks on the mice. Alternatively, use a pretreated cotton product intended for mice.
Apply a topical tick killer and repellent on your dogs or cats. Alternatively, use a tick collar or an anti-tick dip or shampoo if your pet doesn't mind being bathed. Such products are broad-spectrum solutions that kill all types of ticks.
Spray problem areas in your yard with a broad-spectrum insecticide. Such products can be obtained from most garden supply and hardware stores. Focus on areas which are frequented by deer or mice, such as the edges of your property, fences and stone walls. Note that such a product will kill all insects, including those that are beneficial, and should be used on a limited basis.
Spray your clothing with a solution containing permethrin, which kills deer ticks on contact. An application of permethrin to your clothing will linger in the fabric for several days and provide long-lasting protection against ticks.