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Description
K9 Advantix II XL Dog Flea, Tick & Mosquito Treatment & PreventionK9 Advantix II Extra Large Dog is the veterinarian recommended formula that helps defend your dog against five pests: fleas, ticks, mosquitoes, biting flies and lice. And unlike other treatments, K9 Advantix II kills and repels fleas, ticks and mosquitoes. K9 Advantix II topical treatment gets straight to work killing fleas on dogs within 12 hours of initial application. This formula stops existing flea infestations and prevents new ones by killing
K9 Advantix II Extra Large Dog is the veterinarian-recommended formula that helps defend your dog against five pests: fleas, ticks, mosquitoes, biting flies and lice. And unlike other treatments, K9 Advantix II kills and repels fleas, ticks and mosquitoes. K9 Advantix II topical treatment gets straight to work killing fleas on dogs within 12 hours of initial application. This formula stops existing flea infestations and prevents new ones by killing adult fleas on contact so they can’t lay eggs and they don’t have to bite your dog to die. Fleas, ticks, mosquitoes and other pests not only cause discomfort; they may also transmit disease. Monthly use of K9 Advantix II is important to protect your dog against fleas that may cause transmission of tapeworms. This formula also kills fleas which may cause Flea Allergy Dermatitis and flea bite anemia. That’s why K9 Advantix II Extra Large Dog topical, spot-on formula makes application simple - going on in seconds. It's easier than a flea collar and there are no hard-to-swallow pills. You’ll also love that K9 Advantix II is fragrance-free and waterproof after 24 hours of application. Check the product label for information on application and potential side effects. K9 Advantix II pest protection is effective on both indoor and outdoor dogs. Your dog should be at least 7 weeks old and weigh over 55 lbs. to use K9 Advantix II Extra Large Dog. For the ultimate convenience in care, K9 Advantix II is available over the counter – no prescription needed. And, you can stock up with 2-dose, 4-dose and 6-dose packs so you never miss a monthly treatment. Once K9 Advantix II is applied, your dog is ready to get right back to big-pup cuddles and racing around the park. K9 Advantix II Extra Large Dog is a trademark of Elanco or its affiliates.
Key Features
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K9 Advantix II Extra Large Dog 30-day treatment & prevention protects dogs over 55 lbs. from fleas, ticks, mosquitoes, biting flies and lice
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Kills fleas within 12 hours of application
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Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die
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Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
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No prescription needed
Directions for Use
Use only on dogs. DO NOT USE ON CATS or other animals. Do not apply to dogs weighing less than 4 lbs. Remove applicator tube from the package. Use scissors and peel down foil. Hold applicator tube in an upright position. Pull cap off tube. Turn cap around and place other end of cap back on tube. Twist cap to break seal, then remove cap from tube. The dog should be standing for easy application. Evenly apply entire contents of the tube along the top of the dog's back, from the shoulder down to the base of the tail. The number of spots depends on the size and weight of your dog (please refer to the product label). At each spot, part the hair until skin is visible. Place the tip of the tube on the skin and gently squeeze to expel a portion of the solution on the skin. Do not apply an excessive amount of solution at any one spot that could cause some of the solution to run off the side of the dog. Do not get this product in your dog’s eyes, or allow your dog to ingest this product.
Storage Instructions
Store in a cool, dry place inaccessible to children and pets. Protect from freezing.
Active Ingredients
Imidacloprid, Permethrin, Pyriproxyfen
Product Form
- Topical
Pet Size
- Extra Large
Pet Lifestage
- 7 weeks and older
Pet Weight
Over 55 lbs
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 2355 reviews
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Product Reviews
★★★★★ 5
A very comfortable shirt at a good price!
Size: Large, Color: Blue
Comes out very soft once washed!
I ordered this shirt when I saw it and was curious how stiff the material was. I was expecting something a bit more coarse since it was western wear, but was pleasantly surprised to find that once washed it became very soft. The shirt is also very light and airy, and allows the breeze through to cool you off.
I was also impressed with the quality of the shirt. All the stitching is tight and neat, and there were no threads hanging loose to catch on anything.
As far as sizing goes, it was exactly what they recommended based on measurements, and it fits great. The cut of the shirt is pretty nice also with a bit of a taper, and it looks really good on (according to my wife, anyway).
The shirt is versatile enough to wear out to dinner at the steakhouse, or to work in the yard.
Bottom line: The shirt is comfortable, fits well, is good for work or going out, and a great deal for the money!
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Reviewed in the United States on April 10, 2026
★★★★★ 4
Looked amazing… but not built for broader shoulders
Size: Small, Color: Blue, Size: Small, Color: Blue
I got this for my husband because he’s fully leaning into his cowboy era lately (new boots, new attitude, the whole thing), and I thought this shirt would seal the deal.
First impression—honestly impressed. The color is really nice and the embroidery detail looks great in person. It doesn’t feel cheap at all and definitely looks more high-end than expected.
For reference, he’s about 5’6”, 140 lbs with an athletic build. The shirt almost worked—it fit well through the body and could be fully buttoned, but the shoulders were just too tight. As soon as he moved his arms, it felt restrictive, like the seams were being pushed to their limit.
Which is a shame… because wow, he looked GOOD in this. And that’s coming from someone who doesn’t usually love this style.
I’d say this shirt runs better for slimmer or narrower builds. If you’ve got broader shoulders or any upper body muscle, you may want to size up or skip this one.
Overall, great quality and style, just not the right fit for an athletic frame.
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Reviewed in the United States on March 28, 2026
★★★★★ 5
A Western Shirt That Works as Hard as It Looks
Size: Medium, Color: Blue
A Western Shirt That Works as Hard as It Looks
This men's western shirt strikes a really solid balance between style and everyday wearability. The cotton-polyester blend fabric keeps things soft and breathable without feeling too heavy, and the exquisite floral embroidery on the turn down collar adds a level of detail that makes it look far more elevated than a basic button down. Whether you're heading to a country concert, a western-themed party, or just pairing it with jeans and cowboy boots on a casual day out, it fits the moment without trying too hard.
The versatility here is genuinely one of the stronger selling points. It works just as well at a rodeo or western-themed wedding as it does for everyday casual wear, and the timeless embroidered design means it won't feel dated after a season. Care is simple with machine or hand wash and hang to dry, so it's low maintenance for something that looks this put together. It also makes a thoughtful and practical gift for a husband, boyfriend, or father who appreciates a little western flair in their wardrobe. Just make sure to check the size chart carefully before ordering since sizing can vary with this style of shirt.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Well Made
Size: X-Large, Color: Navy Blue
When my husband put this shirt on, the women comment him on how he looks. I have to admit "He looks great in this attractive western shirt." The blue is a nice blue. He bought a black one, too and it is also very well made and nice looking. The sizing was perfect. It is wrinkle resistance, a great fabric thickness and comfortable. Definitely would buy him another if these ever wear out. It is a great value for the money.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Great Quality - Son loves it!
Size: Large, Color: Black
I ordered this beautiful Western shirt for my son for Christmas. He loves it so much he wears it once a week. The quality is excellent. The fabric is relatively thick, but not too thick - a nice, sturdy fabric. The embroidery is absolutely beautiful! It looks even better in person. The large fit him true to size, like all his other size large men's button up shirts. There are no loose threads or flaws in the stitching. It looks and feels expensive - well worth every penny of the $40 price. It has held up well in the wash. There has been no fading or shrinking. It is now March and it has been washed once a week since Christmas. (Please note - I don't put it in the dryer. I hang it to dry.) I highly recommend if you are looking for a fancy Western shirt.
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Reviewed in the United States on March 12, 2025