Advantage Kitten and Small Cat Under 4kg (Orange) is a monthly topical flea treatment for kittens and small adult cats in the lightest dose band. The 6-pack gives six months of continuous flea protection for one cat, and the orange packaging matches the small-cat dose tier in the Advantage range.

Applied to the back of the neck, Advantage kills fleas on contact, with reinfesting fleas killed within around an hour of contact. It also kills flea larvae in the cat's surrounding environment and can help reduce flea allergy dermatitis in sensitive cats. The formula is water-resistant, safe on kittens from birth and safe on pregnant and lactating cats, which makes it one of the few products that can be used across an entire household of cats regardless of life stage.

The Under 4kg Orange pack is the correct Advantage dose for kittens and small adult cats, rather than splitting a larger dose down. Owners stick with Advantage because the fast action is noticeable within minutes for cats showing visible flea irritation.