Advocate Green is a monthly spot-on parasite treatment for puppies and small dogs up to 4kg. A single application to the back of the neck handles fleas, heartworm, intestinal worms and mites for the month ahead. The green pack is the size-coded variant for the smallest dogs, so match your puppy's weight before you buy.

Each pipette delivers imidacloprid and moxidectin, a combination that kills adult fleas and flea larvae in the environment, prevents heartworm disease, and treats roundworm, hookworm, whipworm and oesophageal worm. It also handles sarcoptic mange, demodex and ear mites. The treatment is water-resistant once dry, so bathing and swimming a couple of days after application won't strip its effect.

Owners of small dogs tend to stick with Advocate because one product covers most of the common parasite ground without needing a separate worming tablet. The spot-on format also suits dogs that refuse chews or spit out tablets.