10 Best Flea Collars for Small Dogs in 2025: Reviews & Top Picks

Fleas are a nuisance that must be dealt with, especially if you have a small canine pal.¹ For dog parents, finding the perfect flea collar that is safe and effective may seem like a challenge, especially with all the options on the market. Pet parents must consider a few factors when looking for flea collars, such as the ingredients used and if the collar actually works.

In this guide, we’ll list our top 10 picks of flea collars based on user reviews to help you make a safe and informed decision for your small dog.

A Quick Comparison of Our Favorites in 2025

The 10 Best Flea Collars for Small Dogs

1. Adams Flea and Tick Collar – Best Overall

This Adams Flea and Tick Collar is suitable for toy and small dog breeds and provides up to 7 months of protection. The collar is odorless and begins killing fleas and ticks instantly, and it’s easy to put on your dog. It is water-resistant, so it won’t lose its effectiveness if it gets wet. Not only does it kill fleas and ticks, but it also kills flea eggs, tick larvae, and tick nymphs.

Its small size is designed for small dogs, and the excess can be trimmed off after application. The Adams Flea and Tick Collar may cause irritation in some dogs, so if you notice irritation, remove it and discard it immediately. With its low price and 7 months of protection, this collar is the best overall flea collar for small dogs.

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2. Hartz UltraGuard Pro Reflecting Flea & Tick Collar – Best Value

The Hartz UltraGuard Pro Reflecting Flea & Tick Collar provides full body protection for up to 7 months. It kills flea eggs and breaks the reproduction cycle, leaving your dog flea-free. It’s safe for all breed sizes 12 weeks and older, and it’s water-resistant. The Hartz flea collar features a Reflect-X Shield that reflects direct light for up to 450 feet for nighttime safety. It’s made in the U.S.A., and it protects against fleas, flea eggs, and ticks.

This collar may not be effective for all dogs, so be sure to watch out for any irritation. The smell may be too pungent for some consumers. However, for the price, it is the best flea collar for the money.

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3. Seresto Flea & Tick Collar – Premium Choice

The Seresto Flea and Tick Collar provides up to 8 months of protection against fleas and ticks. It is veterinarian-recommended and safe for dogs 7 weeks or older. The collar is easily adjustable and begins working to repel fleas within 24 hours of applying. It kills ticks within 48 hours and re-infestations within 2 hours for fleas and 6 hours for ticks. It’s odorless, non-greasy, and has a quick release for easy removal. It’s also water-resistant.

Some consumers claim the collar does not work for the entire 8-month duration, and some dogs may scratch at it. This collar is also expensive and only suitable for dogs up to 18 pounds.

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4. Advanllent Flea Collar for Dogs

The Advanllent Flea Collar for Dogs uses essential oils to repel pests and is safe for 8-week-old puppies. It’s designed for small breeds and repels fleas, flea larvae, ticks, sarcoptic mange, and lice. It’s 15.5 inches long, but you can cut off the excess and adjust the collar if you have a tiny dog.

The Advanllent collar is waterproof and provides 8 months of protection. Most pet parents were pleased with the collar’s performance. However, some users claimed it only worked half as long, and others mentioned that the collar did not prevent ticks from infesting their pups.

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5. Shengkou Flea and Tick Collar

This two-pack flea and tick collar from Shengkou is another safer option that uses all-natural ingredients. The oils used are cinnamon, citronella, garlic, lemongrass, and thyme. The Shengkou collar protects against fleas, ticks, lice, and mosquitoes.

This pack of collars provides 12 months of protection (6 months per collar) and is waterproof. The collars also come with a breakpoint design for safety that releases in case your pup gets hung up on an object, such as a tree branch.

They have a citronella smell that lasts 2 to 3 weeks, and if the smell is too strong, you can open the package and wait to apply it to your dog until the smell diminishes. Some users claim the collar is difficult to put on a dog, and even though it’s waterproof, users claim the collar may be ineffective once wet.

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6. JMXU’S Flea and Tick Collar

JMXU’S Flea and Tick Collar fits all dog sizes and continuously releases safe ingredients in low concentrations to combat fleas and ticks. The collar is adjustable but only fits dogs 18 pounds and up, meaning it will not work with toy breeds but should work well for small breeds.

This collar kills fleas, flea eggs, and ticks and repels mosquitos. It has a dual buckle system that allows for easy application. It’s waterproof and fits dogs 7 weeks and up. Some users said the collar only works for roughly 3 months, and only 4% of the product has all-natural ingredients. The all-natural ingredients include cinnamon, vanilla, lemongrass, and thyme oil.

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7. Vicsom 4 Pack Flea Collar for Dogs

The Viscom 4 Pack Flea Collar for Dogs is one of the most affordable products on our list, but it doesn’t leave a greasy residue on your dog like other low-priced collars. The Vicsam flea collars contain essential oils to repel lice, ticks, mites, fleas, and flea larvae.

They can be adjusted and fit most breeds, and since they’re environmentally friendly, you won’t feel guilty when you dispose of them. They’re water-resistant but aren’t waterproof like most collars. Although most customers were satisfied with the Vicsom flea collars, some said they were ineffective.

Others mentioned that their hairless dogs developed a rash and that the Vicsom flea collars smelled too strong.

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8. Monipgu Flea and Tick Collar

The Monipgu Flea and Tick collar is another product that uses all-natural oils for a safer option, which may be ideal if your pup suffers from skin allergies. This collar kills fleas, flea eggs, flea larvae, and ticks. It’s waterproof and fits small, medium, and large dogs. It’s also easily adjustable and offers 8 months of protection.

The collar comes in a pack of two with a flea comb and instruction manual, all at a reasonable price. It offers a quick release, and if you are not completely satisfied with the collar, customer service will get back to you within 24 hours.

A downside of this product is that it does not disclose all the ingredients used until you buy it and can read the label inside, even though it advertises “all-natural” ingredients, so proceed with caution. The collar is also hard to adjust.

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9. Fipukin Flea and Tick Collar

The Fipukin Flea and Tick Collar was created by veterinarians and lasts 8 months. This two-pack comes with a flea comb and tick removal tool and also repels lice. It’s waterproof and easily adjusted for a perfect fit.

The Fipukin collar continuously emits natural plant oils for effectiveness, and the company donates a portion of all proceeds to the Animal Welfare Association. It’s also made with an emergency breakpoint design. Some users stated that the collar does not work, and skin reactions may occur, so proceed with caution. It also has a strong chemical smell.

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10. TevraPet Activate II Flea & Tick Collar

The TevraPet Activate II Flea & Tick Collar provides 6 months of protection and is suitable for dogs of any size. It kills fleas and ticks on contact, and the collar is fully adjustable. It also kills flea eggs, larvae, ticks, and mosquitos. This collar is vet-approved and starts working within 24 hours. If you are not completely satisfied, the company will refund you within 1 year of purchase. The TervaPet collar is made in the U.S.A.

A common complaint with this collar is that it doesn’t work well to kill ticks, and some dogs may have unpleasant adverse reactions, such as diarrhea, skin reactions, and trembling.

Buyer’s Guide: Choosing the Best Flea Collars for Small Dogs

Picking a flea collar is important for your small dog’s health, and one size does not fit all. Some factors need to be considered before purchasing, and in this buyer’s guide, we’ll go over them to help you even further.

How Flea Collars Work

Flea collars release chemicals on your dog’s skin and fur. They are designed to continuously release the chemicals, providing protection for 6 months and up. Flea collars can be a more affordable option than topical treatments, and you don’t have to worry about remembering to administer topical treatments monthly.

However, some flea collars may cause adverse reactions in some dogs, such as skin irritation, vomiting, diarrhea, trembling, and even seizures. We recommend consulting your veterinarian before purchasing a flea collar to ensure its safety.

Synthetic vs. All-Natural Ingredients

Some flea collars advertise using only all-natural ingredients rather than synthetic ingredients. All-natural flea collars use essential oils, but some essential oils are safe for your small dog. For example, some all-natural flea collars use citronella oils, which can be toxic if ingested. When contemplating a collar that uses citronella, ensure the oil is on the inside so your dog cannot lick it off.

Waterproof Flea Collars

All the flea collars mentioned above are waterproof, which is an important feature to consider, especially if your dog loves the water. Bear in mind, however, that prolonged exposure to water may cause the collar to lose its effectiveness.

Comfort

The flea collar you choose must be comfortable for your dog. Most are easily adjustable, but the collar should not be too tight around your dog’s neck. Ensure you can slip two fingers between the collar and your dog’s neck.

Another excellent feature to look for is if the collar has a breakpoint design, meaning it will release if your dog gets hung up on an object, which could cause choking.

Efficacy

Most of the flea collars we’ve listed protect not only against fleas but also flea eggs, larvae, ticks, lice, and mosquitos. Some also break the life cycle to prevent more fleas. It’s important to check the efficacy of a flea collar before purchasing it to ensure it will work for what you need it for.

How We Selected These Flea Collars for Small Dogs

This buyer’s guide was carefully crafted by our writers and editors in collaboration with our team of in-house veterinarians. The flea collars reviewed here are rated on a combination of factors: brand reputation, customer reviews across multiple retail outlets, personal experience, and in some cases, feedback from our own dogs! Together, we choose and review only the best flea collars available, to help you make the most informed decisions that foster the well-being of your furry friends.

Why Trust Dogster?

Dogster has been a trusted brand for dog owners online since 2004, which means we have a lot of experience with flea collars. We are a team of passionate dog owners who care about our pups as much as you do yours. We want the best for every canine on the planet. Dogster’s writers, editors, and veterinarians are deeply invested in the well-being of our pets, and we believe that all pet owners share this dedication to providing only the highest quality products and services for our dogs.

Conclusion

We hope our reviews of the top 10 flea collars help you make an informed and safe decision for your small dog. To recap, the Adams Flea and Tick collar provides 7 months of protection, kills fleas, ticks, flea eggs, tick larvae, and tick nymphs, and is designed for small dogs. For the best value, Hartz UltraGuard Pro Reflecting Flea & Tick Collar provides 7 months of protection, features a reflective shield, breaks the reproductive cycle, and is water resistant.

When in doubt, always consult your vet to provide the safest option for your small dog.

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Featured Image Credit: Alexei_tm, Shutterstock