The British Veterinary Association (BVA) has published its policy on Responsible use of parasiticides for cats and dogs.
From the BVA:
"Concerns about the possible environmental impacts of small animal parasiticide products should be taken seriously by the veterinary profession, pharmaceutical industry, and animal owners
Veterinary professionals should always take a risk-based approach to prescribing medicines, including parasiticides. They should avoid blanket treatment, and instead risk assess use of parasiticides for individual animals, taking into account animal, human and environmental health risks, in addition to lifestyle factors."
BVA, BSAVA, and BVZS policy position on responsible use of parasiticides for cats and dogs
BVA, BSAVA, and BVZS policy position on responsible use of parasiticides for cats and dogs - executive summary