Sentinel Dog

Interceptor vs. Heartgard: Guide to Heartworm & Worm Prevention

Search Petco to find the benefits of both Interceptor and Heartgard worm medicines for dogs. We strive to help you keep your pup happy and healthy.

Updated on October 23rd, 2025

Interceptor vs. Interceptor Plus: Best Heartworm & Worm Med for Dogs

At Petco, learn more about the benefits & differences of Interceptor & Interceptor Plus dewormer for dogs with heartworm, roundworms, hookworms & tapeworms.

Updated on October 23rd, 2025

Unlock Optimal Health: Best Pet Supplements for Your Dog & Cat

Discover how to choose the best supplements for your pet’s health, from essential vitamins to joint support and digestion aids. Learn age-specific and seasonal supplement tips for cats and dogs.

Updated on October 23rd, 2025

Selamectin for Dogs & Cats: Stop Fleas, Ticks & Heartworms

Search Petco for information on selamectin for pets of all kinds. We have all the details on how to prevent heartworms & parasites to keep your pet healthy.

Updated on October 23rd, 2025

Probiotics for Dogs: Optimize Digestion & Immunity for Health

Learn how to improve your dog's life with nutritional probiotics. Help your dog regardless of age or size & manage inflammation, gastrointestinal health & arthritis.

Updated on October 23rd, 2025

What OTC flea treatment is safe for my diabetic dog on Sentinel?

Over the counter flea products that are fine to use with sentinel include frontline plus, advantage and Advantix. Just be sure to not bathe your dog a couple days before or after applying any of those products as that can affect how effective they are.

Dog on Sentinel has fleas. Can I add K9 Advantix for flea control?

Hello, sentinel has an IGR which essentially prevents immature fleas from becoming adult fleas. It does not kill adult fleas. You can still use an adulticide such as advantix spot on to kill the adult fleas. Hope this helps and best of luck.

My dog is at the weight limit for flea/heartworm meds. What dose?

Sentinel has no tick coverage and does not kill fleas. It only sterilizes the eggs. I always go up a size to be safe as most dogs gain weight but rarely lose weight. It has a good safety margin so using the 25-50 pounds medicine would be best. You will continue to need the Simparica or nexgard with this

Sentinel for fleas: Can I use Cap Shield Plus for adult fleas?

Hello. I would stop the Cap Shield Plus because it contains lufernon & so does the Sentinel. Lufernon is useful for flea control, but does not kill adult fleas. You can use a similar product just called Capstar, & this can be used daily, if necessary to kill adult fleas. Or, you can administer it as needed if you see fleas. It is safe to give with the Sentinel. You can also use something else to kill your adult fleas & get ticks, such as Frontline Gold, Advantix or even a Seresto Collar to compliment the Sentinel. Thanks for using Boop by Petco.

Dog on Sentinel has fleas. What's the best way to treat and prevent?

You're correct that Sentinel is considered a "passive" flea control product - it doesn't kill adult fleas, just keeps their eggs from being able to hatch. Capstar would be quite effective at killing any fleas that he currently has on him. It shouldn't be necessary to wash bedding, etc. since the Sentinel will ensure that the fleas are not able to reproduce. In my experience, some dogs do fine with Sentinel as their only flea control method if they are in an environment where they are rarely exposed to fleas. But if you're seeing fleas from time to time, or if your dog has flea allergies or other skin sensitivities, then I would recommend using an adulticide like Nexgard or Bravecto along with his Sentinel.