Fleas can bite your puppy any time of year, leaving them itching and scratching and at risk of tapeworms. These parasites can also transmit diseases to both pets and humans, and severe infestations may lead to anemia in dogs. Using one of the best flea treatments for puppies can keep your dog and your entire family safe.
To make our recommendations, we researched flea medicines using the Companion Animal Parasite Council's Quick Product Reference Guide and consulted veterinarians to learn about treating and preventing fleas in puppies. Since you can't give flea medicine to very young puppies under 4 weeks old, we recommend the Frisco Flea Comb to gently remove fleas. Puppies that are at least 4 weeks old may benefit from Capstar for Dogs, a fast-acting pill that can be given daily until your puppy is old enough for a longer-lasting flea preventive.
Some of the products in this guide are available over-the-counter (OTC), while others require a prescription from your veterinarian. These treatments come in different forms, such as topicals, tablets, collars, and shampoos. Some even provide extra protection by helping to kill and prevent other types of parasites, including ticks, lice, and different types of worms.
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Our top picks for the best flea treatments for puppies
| Category | Our pick | Prescription | Type |
| Best for newborn puppies | Frisco Flea Comb - See at Chewy | No | Comb |
| Best for puppies over 4 weeks | Capstar for Dogs - See at Chewy | No | Tablet |
| Best topical for puppies over 7 weeks | Advantage Multi - See at Chewy | Yes | Topical |
| Best OTC topical for puppies over 8 weeks | Frontline Plus - See at Chewy | No | Topical |
| Best pill for puppies over 8 weeks | Simparica TRIO - See at Chewy | Yes | Topical |
| Best shampoo for puppies over 12 weeks | Adams Plus Flea and Tick Shampoo with Precor - See at Chewy | No | Shampoo |
| Best flea collar for older puppies | Seresto Flea and Tick Collar - See at Chewy | No | Collar |
Best for newborn puppies
This double-sided flea comb gently removes fleas from very young puppies.
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Most flea treatments are labeled for puppies over 8 weeks old. The Food and Drug Administration (FDA) has not approved any flea treatments for puppies under 4 weeks. If you have a very young puppy with fleas or ticks, you can use a flea comb to gently remove the parasites.
Dr. Brian Collins, a veterinarian and senior lecturer at Cornell University College of Veterinary Medicine, recommends the Frisco Flea Comb for its convenience and affordability. It's cheap enough to buy several so you always have one on hand. "Fortunately, all flea combs tend to work very similarly," he says. "In addition to their functionality as flea finders and removers, flea combs can come in handy for some grooming situations, such as around the eyes and lips."
The comb's two-sided design offers additional benefits. "Double-sided flea combs are great," says Dr. Sarah Gorman, a veterinarian and owner of Bedford Animal Hospital. "They're easy to disinfect and come in both plastic and metal." To use the comb, place your puppy in an empty bathtub to keep any fleas and eggs contained. Dip the comb in water and gently comb your puppy from their head down to the base of their tail. Continue dipping the comb in water every three or four strokes to remove fleas and flea eggs.
Best for puppies over 4 weeks old
Capstar for Dogs is safe for puppies as young as 4 weeks old and starts killing fleas within 30 minutes.
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Capstar is our top pick for the best flea and tick protection for puppies as young as 4 weeks old. This OTC oral flea medication starts killing fleas quickly. "Capstar is a safe, effective product that can start killing fleas in only 30 minutes," Collins says, adding that he uses it to treat existing flea infestations. This medication is safe for puppies as young as 4 weeks old, as long as they weigh at least 2 pounds.
The active ingredient in Capstar, nitenpyram, kills over 90% of adult fleas within four hours. While it's effective for treating flea infestations, it doesn't provide long-term flea protection. "It only lasts for one day and has no effect on the flea eggs, larvae, or pupae," Gorman says. Still, if your puppy is too young for other flea medications, you can safely give them a daily dose of Capstar until they are old enough to transition to a long-term flea preventative.
Best topical for puppies over 7 weeks old
With just one easy monthly application, Advantage Multi for Dogs treats, controls, and prevents more parasites than any other topical product.
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Advantage Multi is one of the best flea and tick treatments for dogs, and you can start using it once your puppy is 7 weeks old. It contains two active ingredients, imidacloprid and moxidectin, which work together to not only kill and prevent not only fleas but also to prevent roundworms, hookworms, whipworms, heartworms, and mange mites.
"Imidacloprid, the ingredient that kills fleas, has been in use for a long time and is very safe and effective," Collins says. One key benefit of Advantage Multi, he says, is that it kills fleas without them needing to bite your puppy. It can also eliminate newly acquired fleas.
Because Advantage Multi also prevents heartworm, you'll need a prescription from your vet. They can apply the treatment to your puppy in-office, or you can do it at home. Just apply it to your puppy's skin in three or four places from the base of their neck to their upper back. Make sure to keep other pets and children from touching the treated area until the medication dries, which takes a few hours. You can use this monthly treatment once every 30 days.
Best OTC topical for puppies over 8 weeks old
Frontline Plus kills flea eggs, larvae, and adult fleas, along with chewing lice and ticks. This OTC treatment can prevent fleas for up to 90 days.
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If your puppy weighs over 5 pounds and is older than 8 weeks, Frontline Plus may be a great choice for killing and preventing fleas and ticks. "Frontline has been on the market for a long time and has a track record of safety and efficacy," Collins says. This topical treatment is widely available over the counter, so you can begin tackling infestations without a vet visit.
Frontline Plus contains two active ingredients: fipronil, which targets both ticks and adult fleas, and S-methoprene, which prevents flea eggs from hatching and stops the growth of flea larvae. Plus, Collins says fleas don't need to bite your dog for the medicine to work, so it may be a good option for dogs with flea allergies.
Once it dries, it's waterproof, so your puppy can still swim or bathe. To apply Frontline, part the hair at the base of your puppy's neck, between their shoulder blades, and apply the entire dose in one spot. Avoid letting children and other pets touch the application spot until the medication has dried.
Best pill for puppies over 8 weeks old
Simparica TRIO treats, controls, and prevents more parasites than any other oral product, offering a full month of protection with one easy-to-give flavored pill.
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If you prefer not to use topical flea treatments for your puppy, you might consider an oral flea medication like Simparica TRIO. This liver-flavored chewable tablet contains three active ingredients: moxidectin, sarolaner, and pyrantel. These drugs work together to provide 30 days of protection against multiple parasites, including fleas and flea larvae along with chewing lice, five types of ticks, mange mites, and three types of worms, including deadly heartworms.
Simparica TRIO is an excellent choice for the best flea and tick protection for puppies 8 weeks and older because it is highly effective. It kills all adult fleas on your dog within just eight hours. Both of our experts recommend Simparica TRIO to clients with puppies over 8 weeks old. "This is the product we recommend in our practice as it is cost-effective, safe, and all-inclusive in terms of coverage," Gorman says. Collins adds that oral medications like Simparica TRIO aren't affected by bathing or swimming, making them ideal for water-loving puppies.
Your vet will need to prescribe this medication. If your puppy has a neurological disorder or history of seizures, however, another medication may be a better option.
Best shampoo for puppies over 12 weeks old
Adams Plus kills fleas, flea eggs and larvae, ticks, and lice for up to 28 days while soothing dry, irritated skin.
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If your puppy over 12 weeks old needs a flea bath, Adams Plus Flea and Tick Shampoo with Precor may be a good choice. Its active ingredients — pyrethrins, S-methoprene, and piperonyl butoxide — work together to kill fleas and ticks for up to 28 days, while oatmeal helps soothe and relieve your puppy's itchy, irritated skin.
The best flea shampoos for dogs can certainly help kill live fleas and ticks on your puppy, but many veterinarians say these products are less effective than our other picks for the best flea and tick protection for puppies. Shampoos can't break the flea life cycle, so your puppy can easily get fleas again. What's more, the insecticides used in these shampoos may cause irritation, particularly for puppies with sensitive skin.
When using flea shampoo, read the label carefully and leave it on your puppy for the entire time recommended — five minutes for this specific product. Avoid leaving it on for a longer period of time or rinsing it off too early. Leaving it on too long could cause skin irritation and other side effects, while rinsing it off too soon may reduce its effectiveness.
Like all shampoos labeled for dogs, this product should not be used on cats. If you have cats in your household, make sure they do not come in contact with this shampoo.
Best flea collar for older puppies
Puppies 7 weeks and older can wear the Seresto Flea and Tick Collar for Dogs, which protects against fleas, ticks, mange mites, and chewing lice for up to eight months.
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The Seresto Flea and Tick Collar for Dogs is safe for puppies as young as 7 weeks old and is the only flea collar that Collins recommends to his clients. The collar helps control fleas, ticks, and other parasites for up to eight months by releasing imidacloprid and flumethrin in low doses. It's highly effective and kills parasites on contact before they even bite your puppy.
"I am comfortable using this collar on puppies as long as they are closely monitored," Collins says, adding that you'll need to adjust the collar as your puppy grows to prevent it from becoming too tight and damaging their skin. You should be able to fit two fingers between the collar and your puppy's skin. Just make sure children don't touch the collar and that other pets in your home don't chew on it.
What to look for in flea medicine for puppies
Regardless of your dog's age, there are several factors to consider when choosing flea prevention. Your puppy's age, in particular, will help determine which products are safe for them. Here's what veterinarians recommend you keep in mind before selecting a treatment for your puppy.
Type of treatment: The best flea and tick protection for puppies recommended by veterinarians include chewable tablets, topical medications, collars, and shampoos. "When choosing a flea and tick preventative, there's no one-size-fits all," Gorman says. Your vet can help you choose the best option based on your puppy's age, health, breed, and lifestyle. For instance, a puppy who swims often or gets frequent baths might benefit more from a prescription oral medication, while OTC topical treatments can be more budget-friendly.
Application method: Some flea treatments are more difficult to use than others. With topical treatments, it's important to apply them in the correct spot to ensure they work properly and prevent your puppy from licking it off. You'll also need to keep treated puppies away from other pets, especially cats, until the medication has been fully absorbed, and you may need to wear gloves to apply it. Oral medications may offer a simpler alternative for squirmy puppies or those who can't tolerate topical treatments.
Safety for puppies: Flea treatments approved by the FDA or Environmental Protection Agency (EPA) are safe to use on your pets. Approval from these organizations means the product has been thoroughly tested for both safety and effectiveness. Before using one of the best flea and tick treatments for puppies, make sure it is labeled for your puppy's specific age and weight. If you can't weigh your puppy at home, ask your vet to confirm their weight before using the medication. Flea treatments meant for older or larger dogs can, in some cases, be fatal to puppies.
Safety for cats: Certain ingredients used in dog flea medications, such as permethrin, are toxic to cats and can be fatal. If you have cats in your home, it's a good idea to use puppy flea treatments that are safe for cats, just in case your cat and puppy come into close contact.
Parasites they kill: Some parasite treatments only kill fleas or both fleas and ticks, while others target a wider range of parasites. Collins says your vet can recommend the right product for your puppy based on the types of parasites in your area and your puppy's risk of exposure. "The recommendations for a dog that goes camping and hiking every weekend in New England is going to be different than the recommendations for a dog that lives in LA and rarely leaves the city," Gorman says. Keep in mind that any product that protects against heartworms requires a heartworm test before you can get a prescription, along with annual heartworm testing.
Prescription vs. OTC treatments: While there are many safe and effective OTC flea treatments, Gorman says your vet may recommend prescription products because they've undergone extensive safety studies to earn FDA approval. Collins says safe and effective products are available at a range of prices, and cost isn't necessarily reflective of a treatment's effectiveness. However, prescription products tend to be pricier, partly because they target more parasites.
How we selected the best flea treatments for puppies
For this guide to the best flea and tick protection for puppies, we consulted two board-certified veterinarians.
Dr. Brian Collins, diplomate of the American Board of Veterinary Practitioners, is board-certified in canine and feline practice and serves as an extension associate with the Cornell Richard P. Riney Canine Health Center. Collins told us about the importance of flea prevention and the safe use of flea treatments for young puppies.
Dr. Sarah Gorman is a board-certified veterinarian, owner of Bedford Animal Hospital, and certified canine rehabilitation practitioner (CCRP) specially trained in physical therapy and rehabilitation techniques for small animals. Gorman explained the benefits of FDA-approved flea prevention products for puppies. She also emphasized that consulting your vet before choosing a flea treatment can help you determine the right product for your region as well as your puppy's age and other needs.
We also referred to the Quick Product Reference Guide from the Companion Animal Parasite Council, an independent nonprofit organization. This reference tool lists every parasite control product approved for use in small animals by the FDA or EPA. The guide also includes detailed information on flea treatments, including instructions for their use, the parasites they kill and prevent, and their active ingredients.
Flea treatments for puppies FAQs
What flea treatment is safe for puppies?
The safest flea treatments for puppies are are FDA-approved products labeled for their specific age and weight. "It's very important to choose a product that is appropriate for the age and weight of the puppy," Collins says. Our experts also recommend checking with your veterinarian about the best product for your puppy. "Any medication can be a source of a reaction in our pets, which is why we strongly recommend using FDA-approved products and avoiding third-party sellers of flea and tick products," Gorman says.
When can you start flea treatment on a puppy?
Most flea medications are safe for puppies over 8 weeks old, but options are limited for puppies under 8 weeks of age. Advantage Multi and the Seresto Flea Collar can be used on puppies as young as 7 weeks, while Capstar is the only flea treatment safe for puppies as young as 4 weeks old. There are no flea treatments approved for puppies under 4 weeks old.
What flea treatment can I give my 8-week-old puppy?
There are many flea treatment options for for puppies that are at least 8 weeks old, but it's important to know select the right product for a puppy's weight. Flea treatments clearly list the recommended age and weight ranges on their labels. Always check the packaging before you apply it to your puppy to ensure it's appropriate for their age and weight, which should also be confirmed with your veterinarian. They can also help you decide which treatment is best for your puppy.
Do new puppies need flea treatment?
"Ideally, puppies would be born into a flea-free environment, but since that isn't always possible, they should be inspected regularly and treated with age-appropriate products when there is evidence of fleas," Collins says. Signs of fleas include increased scratching, small red bumps on your puppy's skin, or flea dirt. Because fleas and ticks can be difficult to see with the naked eye, flea prevention is also important. You can generally start using flea prevention medication for puppies 8 weeks and older, although the specific age range will vary by product. Veterinarians typically recommend continuing flea protection year-round.
Should puppies wear flea collars?
Flea collars can be effective for controlling fleas and ticks for up to eight months when used properly, but our experts say you'll need to replace them more frequently if the collar is regularly exposed to water. The collar should fit snugly, allowing just enough room for you to place two fingers between the collar and your puppy's skin, Gorman says. "A flea collar is not usually my first recommendation for puppies — I generally wait until the puppy has stopped growing," Collins says. "I also advise extreme caution or avoiding them altogether if you have two puppies, or another dog who might wrestle and chew on the collar."
Do puppies need flea and tick medicine?
Gorman says puppies need flea and tick protection, even those living in urban areas. Pets of all ages can pick up fleas and ticks from the ground during a walk or even a short potty break and while spending time near other animals. "It's not just other pets that harbor parasites," Gorman says. "Exposure to wildlife, like birds and woodland creatures, also put pets at risk of parasite exposure." Treating your dog promptly at the first sign of fleas can help reduce the chances of an infestation. Collins says your vet can offer more specific flea treatment recommendations based on the parasites and diseases most common in your region.
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