Its active ingredients, fipronil and S-methoprene, work together to kill parasites and break the flea life cycle. Fipronil kills adult fleas and ticks, while S-methoprene prevents flea eggs ...

Fipronil is a popular pesticide, often used to de-flea household pets such as dogs ... centring on two firms - Poultry Vision, a pest control firm from Belgium, which is alleged to have sold ...