Pesticide actives

What the research says

A flea and tick product is a pesticide, and the EPA makes it print an ingredient statement no other pet product has to: every active by name and percentage, with the inert ingredients totalled underneath. That is more disclosure than a shampoo or a litter gives you, not less, and it is why we can read these panels precisely.

We flag the actives on every product in the category, not because a particular one is dangerous, but because "natural" and "chemical" are not the useful distinction here. Cinnamon, clove and cedarwood oils kill insects by the same logic as a synthetic pyrethroid, and cats in particular metabolize several essential oils and permethrin poorly. Dose, species and directions are what matter, so the note on each product names its actual actives and what they are.

Read the species on the front. A permethrin product labelled for dogs can be fatal to a cat in the same house, and several essential-oil formulas that are fine on a dog are not labelled for cats either. Nothing about this flag says avoid the category: an untreated flea infestation carries its own real risks.