Combination product for controlling parasites on animals

1. A composition for controlling parasites on animals, comprising:

a. fipronil;

b. flumethrin;

c. an aliphatic cyclic carbonate; and,

d. an aliphatic cyclic or acyclic polyether.

2. The composition of claim 1 , further comprising an ester of a dihydric or trihydric alcohol having up to three carbon atoms with organic fatty acids having 6 to 18 carbon atoms.

3. The composition of claim 1 , wherein the fipronil is present in an amount of from 1 to 27.5% by weight of the composition.

4. The composition of claim 1 , wherein the aliphatic cyclic carbonate is present in amount of from 10 to 70% by weight of the composition.

5. The composition of claim 1 , wherein the aliphatic cyclic or acyclic polyether comprises from 20 to 77.5% by weight of the composition.

6. The composition of claim 1 , wherein the fipronil is present in an amount of from 7.5 to 15% by weight of the composition.

7. The composition of claim 1 , wherein the cyclic carbonate is selected from the group consisting of ethylene carbonate, propylene carbonate, and mixtures thereof.

8. The composition of claim 1 , wherein the aliphatic cyclic carbonate is present in an amount of from 15 to 40% by weight of the composition.

9. The composition of claim 1 , wherein the aliphatic cyclic or acyclic polyether is selected from the group consisting of diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, dipropylene glycol monopropyl ether,and tetrahydrofurfuryl alcohol.

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

a. fipronil;

b. flumethrin;

c. propylene carbonate; and

d. dipropylene glycol monomethyl ether.

11. A method of controlling ticks on an animal, which comprises applying to said animal an effective amount of the composition of claim 10 .