# TLDR Review: K9 Advantix II Flea & Tick Prevention for Dogs (11-20 lbs, 6 Doses) *Published: 2025-02-11 | Updated: 2025-01-17 | Source: https://shopsavvy.com/reviews-tldr/k9-advantix-ii-flea-and-tick-prevention-for-dogs-(11-20-lbs-6-doses)* --- ## Verdict K9 Advantix II is a trustworthy choice for flea and tick prevention, offering effective results, though a more user-friendly application method would be preferable. **Top pro:** Consistently reliable in preventing fleas and ticks **Top con:** Application requires three spots along the dog's back, which is less convenient ## Product: K9 Advantix II Flea & Tick Prevention for Dogs (11-20 lbs, 6 Doses) **Brand:** Bayer Animal Health [Compare prices and price history on ShopSavvy](https://shopsavvy.com/products/k9-advantix-ii-flea-and-tick-prevention-for-dogs-%2811-20-lbs-6-doses%29) ## Pros - Consistently reliable in preventing fleas and ticks - Provides peace of mind over years of use across different dogs - Highly satisfied with performance and effectiveness ## Cons - Application requires three spots along the dog's back, which is less convenient - One particular order did not work as expected ## Pros vs Cons at a Glance | Pros | Cons | |------|------| | Consistently reliable in preventing fleas and ticks | Application requires three spots along the dog's back, which is less convenient | | Provides peace of mind over years of use across different dogs | One particular order did not work as expected | | Highly satisfied with performance and effectiveness | | ## Last Seen Prices *Each price is the last one ShopSavvy observed, between 2025-01-17 and 2026-10-10; it may have changed since.* | Retailer | Price | Availability | Last seen | |----------|-------|-------------|-----------| | [Amazon](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/00a798b4-bd8f-ee53-180a-9912cc1c354b?source=shopsavvy&medium=article-review-tldr) | $75.92 | In Stock | 2026-10-10 | | [BaxterBoo.com](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/b8cbe407-2019-e3d1-824f-2435d6a01cde?source=shopsavvy&medium=article-review-tldr) | $77.98 | In Stock | 2025-01-17 (may have changed) | | [Chewy.com](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/c0106a77-ed60-7862-75ec-0664450b49ba?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [EntirelyPets Pharmacy](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/55efa031-7cf0-63f0-6d2d-fa8eea4ca5b0?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [HealthyPets.com](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/1ae1f1f1-8f39-17d5-9407-117a7086deb7?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [Petco.com](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/6856a58d-cc5f-9e3c-9cd9-39b5ab590218?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [PetMeds](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/34teRuGDXEHcvoFqzPAt?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [UPCO Pet Supplies](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/usCBSXca3cYH5pWyW92D?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [Valley Vet Supply](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/iJp8Ln6e8d8fEq8r3hdW?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [Walmart](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/4bd73236-ce20-78f9-010a-ff07dd0a7e21?source=shopsavvy&medium=article-review-tldr) | $79.98 | In Stock | 2025-01-17 (may have changed) | | [PetCareRx](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/2c3ffa6c-7633-be59-1a95-2b6eafd5b4c2?source=shopsavvy&medium=article-review-tldr) | $79.99 | In Stock | 2025-01-17 (may have changed) | | [PetSmart](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/6HlZA8NCuPlcXg1BlIEL?source=shopsavvy&medium=article-review-tldr) | $79.99 | In Stock | 2025-01-17 (may have changed) | | [Chuck & Don's](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/a1d5a9f9-f315-63b8-fad7-4e4b996429e0?source=shopsavvy&medium=article-review-tldr) | $88.99 | In Stock | 2025-01-17 (may have changed) | | [Allivet Pet Pharmacy](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/ecb6e4bd-fc8b-a57a-3824-818f7354bb52?source=shopsavvy&medium=article-review-tldr) | $89.58 | In Stock | 2025-01-17 (may have changed) | | [Jefferspet.com](https://shopsavvy.com/api/redirect/products/EdOXlJ13ebw84mvS1zID/offers/1zmCBoJjJ2C9SXEl5alt?source=shopsavvy&medium=article-review-tldr) | $89.99 | In Stock | 2025-01-17 (may have changed) | [See every retailer and the full price history on ShopSavvy](https://shopsavvy.com/products/k9-advantix-ii-flea-and-tick-prevention-for-dogs-%2811-20-lbs-6-doses%29) --- *About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from ShopSavvy's price data (each price shows when it was last seen).* *Machine-readable access: append `.md` to any ShopSavvy URL, or send `Accept: text/markdown`, to get this page as Markdown. For the same catalogue as structured JSON — product lookup by barcode/ASIN/URL, live prices across retailers, and price history — see ShopSavvy's MCP server at https://shopsavvy.com/agents and the Data API at https://shopsavvy.com/data.*