Fipronil and imidacloprid were both banned ... hugely reduce the use of these pesticides. There are also oral flea and tick treatments such as isoxazolines, which rapidly resolve flea infestations.

Fipronil kills adult fleas and ticks ... Best pill Simparica TRIO is our pick for the best flea and tick treatment for dogs in pill form. The fast-acting chewable tablet kills more parasites ...

The active ingredients, such as fipronil or permethrin, work to repel and in some cases kill when a flea or tick bites.

There is concern that anti-flea and tick treatments are washing into watercourses ... and another neonicotinoid, fipronil, was detected in 98% of samples. Further research published earlier ...