Johnson S 4fleas Spot on Dog

A single-vial flea treatment leaves you needing to reorder within a month of opening it, which is exactly the gap this two-vial pack is built to close by giving two months of cover from one purchase.

Johnson's 4fleas Spot On is a fast-acting spot-on treatment that kills fleas on contact, both on the dog and in its surrounding environment, using Imidacloprid as the active ingredient. Each pack contains two vials, and each vial gives up to four weeks of protection, so one pack covers roughly two months. This page covers the large dog pack, listed for dogs over 25kg and over 8 weeks of age.

• Two vials per pack
• Each vial gives up to 4 weeks' protection
• Active ingredient: Imidacloprid
• Kills fleas on contact, on the dog and in the surrounding area
• For dogs over 25kg
• For dogs over 8 weeks of age

On the other sizes. This family also covers medium and small dog packs; the 25kg-plus threshold and dosing above apply specifically to this large dog pack, and Johnson's own labelling on the medium and small packs is what determines the right one for a smaller dog rather than anything printed here.

Who it's for: owners of a large dog over 25kg wanting a fast-acting Imidacloprid spot-on that also treats the surrounding environment, buying two months of cover in a single pack rather than one vial at a time.