Bob Martin Cat Spot On 4 Week, Repels fleas and ticks on cats and kittens from 12 weeks of age. One application will provide up to 4 weeks protection. For use on cats and kittens from 12 weeks of age. Remove fleas from young kittens with careful use of a flea comb. Please ensure that you use the correct Spot On product on your pet, making sure that the product is specific to the animal. Always read the packs carefully before use. This product is suitable for use on cats.