Combination product for controlling parasites on animals

1. A composition for controlling ticks on dogs, comprising:

a. fipronil;

b. permethrin;

c. propylene carbonate; and,

d. diethylene monoethyl ether.

2. A method of controlling parasites in parasite infested animals, which comprises applying to said animals an effective amount of the composition of claim 1 .

3. The method of claim 1 , wherein the animal is selected from cats and dogs and wherein the parasite is selected from the group consisting of fleas and ticks.