Best Dog Flea Drops of 2025

"I switched to this product for my two rottie mixes because the prices on their usual preventatives kept rising. Living in rural Michigan, I haven't spotted any fleas or ticks on them since making the change. They make funny faces when I apply it, but that doesn't bother me. I'm sticking with this as our monthly prevention."

"After years of using Advantix II, I was looking for a more affordable option. I noticed that my dogs started scratching right after I applied this new brand, which made me wonder if it was effective or irritating. Unfortunately, I started to see fleas again after a couple of weeks. I've decided I won't buy this again."

"This product has been a great help in keeping both of my dogs protected. I've made several purchases over the summer and plan to continue using it next summer. My dogs are happy and flea-free!"

"I have really enjoyed using this product. It's incredibly easy to apply, which is great for my fussing dog. It efficiently kills fleas, ticks, and lice, which is a huge relief. Each treatment lasts up to 30 days, making it economical. A truly satisfactory product, well worth the price!"

"I've been using this for years on all my animals, but this month, for some reason, my dog has ticks attached to him. Fleas are never a problem, but ticks are. After hiking, he was covered. At the 4-week mark, I removed them and applied more meds, but a week later, he still has ticks attached. Usually, it works well, so maybe there's a bad batch or they changed something."

"I would recommend this product without hesitation. I love the fact that it's waterproof—no worries when my fur baby plays in the rain. It's fast-acting too, which is great for quick protection. So easy to use—an absolute must-have for all large dog owners!"

"Since moving to middle GA, I noticed a significant tick problem with my dog, Fluke. I had previously used Comfortis without issues, but it didn’t seem to protect against ticks here. I switched to this product, which claims to prevent tick attachment, and so far, it’s been highly effective. Fluke is happy and remains free from fleas and ticks. I applied it in six spots to avoid any concentration issues. While some smaller dogs had adverse reactions, I believe each dog is different. Overall, I’m pleased with my choice!"

"Living in the South means dealing with flea infestations. I had a bad situation and couldn’t get prescription meds due to my vet visit lapse. This product helped me remove many fleas from my dog—up to 100 daily—and now the situation is much better. It’s reusable after a week, which is great for complete elimination. I found it more effective than Frontline, especially for mosquitoes, though I’m not sure of its efficacy against them. It's not waterproof, which is a slight downside, especially since my dog loves the pool. Overall, I'm happy with the results!"

"I have been using K9 Advantix II for a while and I can say that it’s been a lifesaver for my dog. The application is straightforward, and the six-month supply means I don’t have to reapply often. It works quickly to keep my dog comfortable and itch-free, especially during peak bug season. Since it’s vet-recommended, I trust its safety and effectiveness. If you want peace of mind for your furry friend, I definitely recommend this product!"

"Frontline Plus has been my go-to flea and tick solution for my large dog. I have a big Blue Heeler who loves the outdoors, and since using this product, I’ve noticed a huge improvement—no more scratching or irritability. It’s long-lasting and incredibly effective, providing me with peace of mind."

"I think Frontline Plus is an effective product for my 60lb pup. While I’m not a fan of the greasy spot it leaves on her lovely long fur, I’m pleased that she is tick and flea-free without any side effects."

"Although I’m not thrilled about using pesticides on our dogs, I know we must protect them. After researching, I believe Frontline Plus is a wise choice; it offers the highest level of protection with the lowest risk. Severe reactions to its ingredients are rare, which is reassuring."

"I'm having an awful time with fleas this summer. I've been using Amazon brand flea meds, but now it's not working. I’m constantly washing bedding and using flea combs. Fleas are even jumping on me occasionally!"

"At first, this worked great for my puppy who was infested with fleas. I was very pleased, but the effects only lasted about 3 weeks. I had to reapply it shortly after, but the second application was less effective. This product might be good for added protection but not as a first defense."

"This Amazon Basics Flea and Tick Treatment has been perfect for my small dogs! It works great at keeping fleas and ticks away, and they stay flea-free during peak season. It's easy to apply, doesn't irritate their skin, and is a fantastic value!"

"I've had great success with this product! My two dogs have been flea-free for about three weeks now. After using K9 Advantix 2 for years, I switched to Activate 2 because the previous product was too watery and ineffective. Activate 2 stays on the skin and works much better!"

"This product is a game changer! After trying so many ineffective treatments for my multipoo's flea allergies, I finally found something that works. I love that it's affordable for a 4-month supply and it really does the job. Just remember to follow the instructions, especially for severe outbreaks!"

"I was really hoping for good results after hearing recommendations, but unfortunately, this product didn't deliver. I followed the instructions, yet my dog seemed to have more fleas than before. After thorough cleaning and treating, it felt like the product was ineffective. I ended up having to use two packages to see results after all."

"Frontline Plus has been a lifesaver for my little pup! As a dog owner, keeping my furry friend protected from fleas, ticks, and other pests is a top priority, and this product delivers every time. My small dog weighs just under 20 pounds, and this specific size works perfectly for her. The application is straightforward, and the liquid absorbs quickly without leaving any residue or odor on my dog's coat. Within just a day or two, I noticed a huge difference—no scratching, no signs of fleas, and she seems much more comfortable. I appreciate the long-lasting protection for an entire month, especially when we walk in tick-heavy areas. I've never had to deal with side effects, which is a concern with some flea treatments. She stays happy and healthy, and I stay worry-free. I've been using Frontline Plus for years; it's the only flea and tick treatment I trust. Highly recommend this product for small dog owners!"

"Super easy to use and apply. There’s no smell, and my dog showed no unusual behavior afterward. While the instructions state it doesn’t work immediately, by month three, after the third application, our flea problem was completely gone. Before using this product, the fleas were bad in multiple areas of the house. By using this product, along with regular vacuuming and cleaning, we completely eradicated the nuisance. Most importantly, our Manchester terrier is completely healthy and pest-free now!"

"We were fighting fleas for a couple of months, trying everything from dish soap to pills and constantly washing my dog's blankets, but nothing worked. Within 24 hours of using Frontline, she stopped scratching and biting herself! It's super easy to use and didn’t cause any skin irritation. I’ll definitely continue using this product from now on!"

"I noticed changes after three days, but I have multiple dogs, which might explain the delay. Thankfully, there are currently no fleas."

"I bought this for a rescued puppy. The flea bath alone wasn't enough, so I used two treatments in a month, and it worked well."

"I've been using this product for 10 years with great results! It keeps fleas and ticks away, dries quickly, and my dog's fur remains soft."

"I bought this for my dog at my vet's request since he is very allergic to fleas. It worked better than what I was using. After using it, I can confirm he has no more fleas, and it was easy to apply. He sat well for it and didn't give any trouble."

"I usually use another brand of pill, but I decided to try this product. It was a pleasant surprise that it worked as effectively as advertised. Fleas were horrible this year, and bam, gone!"

"I gave this treatment to my 17-pound Shih Tzu and within 2 days she started to limp and was in pain. We took her to the ER Vet, who mentioned similar complaints from other users of this product. It should be taken off the market due to these side effects. Thankfully, she's fine now."

"I've always been a fan of this product because it really does kill fleas and ticks as promised. It's not only affordable, but it also acts really fast. My dog seemed relieved almost instantly. I highly recommend this for anyone facing flea and tick issues with their pets."

"I'm very happy with this product. The fact that it kills both fleas and ticks is fantastic. I was impressed by how quickly it works. The 3-month supply is super convenient, and it even tackles chewing lice. The vet quality formula really shows through, effectively preventing various ticks. It’s truly a high-quality product and a great buy!"

"This product works okay for my two Shih Tzus. Managing the flea situation in our small apartment was stressful. I found that this treatment doesn’t kill flea eggs, so even though it kills adult fleas, the flea cycle wasn't broken. We ended up using Capstar and other methods to get our pups flea-free within a week!"