Amazon has 4-Pack Bayer K9 Advantix II Flea and Tick Prevention for Extra-Large Dogs (Pets Over 55 Pounds, 86315017) on sale for $12.35 when you checkout via Subscribe & Save.
Shipping is free with Prime or on $25+ orders.
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Instructions:
- Click here to visit the product page
- Click the Subscribe & Save tab, then 'Set Up Now'
- Price at checkout will be $12.35 after 5% off Subscribe & Save discount
About this product:
- Includes four (4) monthly applications of K9 Advantix II flea and tick prevention for extra-large dogs weighing 55 pounds or more.