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Adventure on, pests off — an independent K9 Advantix II guide. Not Elanco, and not the brand's official site.
K9K9 Advantix II CatalogFlea & tick protection by weight band Start at the scale

Policy

If the box comes back

Wrong band for the dog on the scale, or a vet said switch — returns run entirely on the retail partner's policy for the listing you bought.

Start from your orders page with the partner; labels, refunds and timelines are theirs from first click to closed case.

One field note: weigh the dog before ordering, not after opening. Topicals in opened boxes return poorly everywhere, and the sizing guide exists so the first box is the right one.

If a listing steered you wrong, tell the guide anyway — the card that misled you gets re-read and rewritten.