Get effective protection from fleas, ticks and mosquitoes with K9 Advantix II from Bayer. This vet-recommended flea and tick control for large dogs between 21 and 55 pounds also kills and repels mosquitoes, a benefit not found in many other flea and tick products. Biting fleas, ticks and mosquitoes are not only a nuisance, they can spread disease and make your dog sick. Just one application of K9 Advantix II kills fleas, ticks and mosquitoes for 30 days. Evenly apply the entire contents of the K9 Advantix II tube to two to six spots (based on label directions and the dog’s weight) on the top of the back from the shoulder to the base of the tail. At each spot, part the hair until the 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. The formula starts to work within 12 hours of application to kill fleas and keeps working for one month. Use year-round to help keep your dog protected from biting and infesting fleas. Do not use on cats; use only on dogs.
Get effective protection from fleas, ticks and mosquitoes with K9 Advantix II from Bayer. This vet-recommended flea and tick control for large dogs between 21 and 55 pounds also kills and repels mosquitoes, a benefit not found in many other flea and tick products. Biting fleas, ticks and mosquitoes are not only a nuisance, they can spread disease and make your dog sick. Just one application of K9 Advantix II kills fleas, ticks and mosquitoes for 30 days. Evenly apply the entire contents of the K9 Advantix II tube to two to six spots (based on label directions and the dog’s weight) on the top of the back from the shoulder to the base of the tail. At each spot, part the hair until the 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. The formula starts to work within 12 hours of application to kill fleas and keeps working for one month. Use year-round to help keep your dog protected from biting and infesting fleas. Do not use on cats; use only on dogs.
K9 Advantix II Flea Tick Prevention
Get effective protection from fleas, ticks and mosquitoes with K9 Advantix II from Bayer. This vet-recommended flea and tick control for large dogs between 21 and 55 pounds also kills and repels mosquitoes, a benefit not found in many other flea and tick products. Biting fleas, ticks and mosquitoes are not only a nuisance, they can spread disease and make your dog sick. Just one application of K9 Advantix II kills fleas, ticks and mosquitoes for 30 days. Evenly apply the entire contents of the K9 Advantix II tube to two to six spots (based on label directions and the dog’s weight) on the top of the back from the shoulder to the base of the tail. At each spot, part the hair until the 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. The formula starts to work within 12 hours of application to kill fleas and keeps working for one month. Use year-round to help keep your dog protected from biting and infesting fleas. Do not use on cats; use only on dogs.
Get effective protection from fleas, ticks and mosquitoes with K9 Advantix II from Bayer. This vet-recommended flea and tick control for large dogs between 21 and 55 pounds also kills and repels mosquitoes, a benefit not found in many other flea and tick products. Biting fleas, ticks and mosquitoes are not only a nuisance, they can spread disease and make your dog sick. Just one application of K9 Advantix II kills fleas, ticks and mosquitoes for 30 days. Evenly apply the entire contents of the K9 Advantix II tube to two to six spots (based on label directions and the dog’s weight) on the top of the back from the shoulder to the base of the tail. At each spot, part the hair until the 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. The formula starts to work within 12 hours of application to kill fleas and keeps working for one month. Use year-round to help keep your dog protected from biting and infesting fleas. Do not use on cats; use only on dogs.
in 32 offers
The lowest price for K9 Advantix II Flea Tick Prevention right now is $43.80 at desertcart.com.au, compared across 6 retailers.
The all-time low was $41.80 on 29 Sept 2026 — today's price is 5% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 6 Nov 2026.
Last updated at 06/11/2026 02:56:11
Bayer K9 Advantix II Flea & Tick Control Treatment, 2 Month Supply
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
K9 Advantix II Flea & Tick Topical for Large Dogs 2155 lbs., 1ct
Delivery between 12–15 Nov $29
II Flea & Tick Topical for Large Dogs 2155 lbs., 1ct
Free delivery between 17–20 Nov
K9 Advantix II Elanco Flea and Tick For SMALL Dogs (4-10 lbs) 2 monthly Doses
Delivery between 10–14 Nov $41
Flea and Tick Prevention for Dogs & Cats, Rabbits - Natural Flea Treatment & Home Pest Control - Topical Flea & Mosquito Repellent for Puppy & Kitten
Delivery between 7–19 Nov $28.87
New - for Dogs 10-22 Lbs. 4 Month Supply by Advantix
Free delivery between 17–20 Nov
| Targeted Pests | Fleas, Mosquitoes, Ticks |
| Active Ingredient | Imidacloprid, Permethrin, Pyriproxyfen |
| Administration Method | Topical, Spot-on |
| Life Stage Age | Adult |
| Treatment Frequency | Monthly |
Bayer K9 Advantix II Flea & Tick Control Treatment, 2 Month Supply
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
K9 Advantix II Flea & Tick Topical for Large Dogs 2155 lbs., 1ct
Delivery between 12–15 Nov $29
II Flea & Tick Topical for Large Dogs 2155 lbs., 1ct
Free delivery between 17–20 Nov
K9 Advantix II Elanco Flea and Tick For SMALL Dogs (4-10 lbs) 2 monthly Doses
Delivery between 10–14 Nov $41
Flea and Tick Prevention for Dogs & Cats, Rabbits - Natural Flea Treatment & Home Pest Control - Topical Flea & Mosquito Repellent for Puppy & Kitten
Delivery between 7–19 Nov $28.87
| Targeted Pests | Fleas, Mosquitoes, Ticks |
| Active Ingredient | Imidacloprid, Permethrin, Pyriproxyfen |
| Administration Method | Topical, Spot-on |
| Life Stage Age | Adult |
| Treatment Frequency | Monthly |