Frontline Spray is a topical parasite treatment suitable for both dogs and cats, including puppies and kittens from two days of age. The pump-spray format lets you cover the whole coat or target problem areas, which is useful for very young, very small, or awkward-to-treat animals where a spot-on pipette isn't practical.

The active ingredient fipronil kills adult fleas, controls brown dog ticks with monthly application, and controls the paralysis tick (Ixodes holocyclus) when applied every three weeks. It also treats biting lice and helps manage flea allergy dermatitis by breaking the flea life cycle on the animal. Coverage depends on coat length, so dosing is calculated by bodyweight rather than a fixed spray count.

Owners tend to reach for the spray when a spot-on doesn't suit — orphaned puppies and kittens, cats that groom pipette residue off each other, or a household mid-flea-outbreak that needs immediate coat-wide treatment rather than waiting for a monthly product to spread.