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You may have heard that flea and tick prevention are crucial for dogs and cats, but do you know why? Petco is sharing why and how to prioritize pest prevention for your pet.
Updated on June 19th, 2026
Vet authorized diets are typically needed only when a pet has specific health issues, but learning about how they're different from "normal" foods can help you be a more well-rounded pet parent.
Updated on June 19th, 2026

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 June 19th, 2026
Do you think your dog might have Leptospirosis? Visit Petco to learn about the signs, symptoms, causes and treatments of Leptospirosis in dogs.
Updated on June 19th, 2026
Read more about the different types of flea treatments and how they work to help eliminate fleas from your pet for their safety and happiness.
Updated on June 19th, 2026
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
Updated on September 24th, 2025
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.
Updated on September 24th, 2025
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.
Updated on September 24th, 2025
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.
Updated on September 24th, 2025
You can find this product at any of the online veterinary pharmacies. In order to find the best value I would recommend going on goodrx.com. On this website you will be able to type in the medication and dose and it will provide you with coupon codes and the location of where you need to obtain the product. Regardless of what site you use you will still need to obtain a prescription from your veterinarian. I always caution my clients when they are planning to purchase these types of products from pharmacies of unknown origin as we cannot be certain how the drugs are being stored and what source they are obtaining the drugs from. Do your due diligence before deciding on which place to use. I have had relatively good experiences with Valley Vet Supply.
Updated on September 24th, 2025