Meet the Other Phone. Child-safe in minutes.

Meet the Other Phone.
Child-safe in minutes.

Buy now

Please or to access all these features

Pets

Join our community on the Pet forum to discuss anything related to pets.

WARNING re dog flea treatments

85 replies

SchnozzaHoomum · 11/08/2025 11:56

I’m posting this because I just saw a thread from a year ago, stating that fleas become resistant to Frontline Plus, and recommending dog parents to “use the stuff the vet gives you instead”.

First of all, the story about drug-resistant fleas is an urban myth and is categorically untrue. Frontline Plus has been used safely and effectively over thirty years. You must apply it properly every 28 days. But it is extremely effective and completely safe for your pet. If you still have flea issues after use, you must wash thoroughly all soft furnishings and start keeping yoir dog clean.
My main reason for posting is the horror I felt when I saw dog parents being advised to use Nexgard / Simparica / Bravecto / Credelio.

PLEASE READ THIS BEFORE GIVING ANY MORE OF THESE DRUGS TO YOUR DOG.
I have spent the last two years doing intensive research, reading up on my own, speaking with other dog mums and dads and also with a consultant at a London vet hospital and our own vet.
All of the above four prescription-only drugs contain an active ingredient which ends in the letters, L A N E R. It might be Axfolaner or Sarolaner or something similar, but they are all from the same family. This is an extremely aggressive ingredient. When you give your dog their “tasty, chewy tablet” each month, you are topping up the significant residue that remains in their body after the previous dose. It can take months or years for their body to reach its limit. With our little schnauzer, it took four years of Nexgard for her to suddenly have violent cluster seizures. Her brain scan showed no epilepsy, and the consultant told us it was extremely rare for a dog of seven years old to suddenly develop epilepsy. This consultant also said it was “more likely than not” that our dog’s attacks were a result of the build-up of Axfolaner / Sarolaner in her little body. We took her off this stuff immediately and put her back on Frontline Plus, which worked perfectly well for the first three years of her life. Frontline Plus, Spot On and their worming tablets - NOT prescription ones, I mean the ones you buy off the shelf at the big pets’ chain store - are the safest and most effective way to prevent and kill fleas, ticks, mites and worms in yoir dog. I researched the active ingredients in these - Fipronil and (S)-methoprene. Their safety record is exemplary. Please do some reading up yourself, but bear in mind that every time you give your dog their Simparica or Nexgard, you are creating a ticking time bomb. The only reason there aren’t tens of thousands more anecdotal cases published is that vets refuse to acknowledge the connection between seizures and the drugs they make a fortune from. By all means disregard this. But I feel better sharing. We know of five dogs in our area alone whose parents believe these drugs have caused neurological reactions. Go safe, and stick to the tried and tested ones that don’t need vets’ prescriptions.

OP posts:
WhatInFreshHell · 11/08/2025 13:31

Dog OWNERS, not dog mums….

Mustbethat · 11/08/2025 13:50

Wall of text. Please use punctuation if you want to make a clear point. As it stands I can barely spot the inaccuracies.

So you’re saying vets are conspiring to harm dogs for profit?

are you sure there’s no research body that actively investigates and publishes toxicity of flea products? I’ve read several papers published so not sure how all this is a big conspiracy.

”do your own research” big red flag often used by those with no actual research training.

SchnozzaHoomum · 11/08/2025 18:41

WhatInFreshHell · 11/08/2025 13:31

Dog OWNERS, not dog mums….

No - dog mums. Many thanks.

OP posts:
K0OLA1D · 11/08/2025 18:43

Front line stopped working for my cats.

I now use advantage. Best flea treatment I've ever used.

SchnozzaHoomum · 11/08/2025 18:47

Mustbethat · 11/08/2025 13:50

Wall of text. Please use punctuation if you want to make a clear point. As it stands I can barely spot the inaccuracies.

So you’re saying vets are conspiring to harm dogs for profit?

are you sure there’s no research body that actively investigates and publishes toxicity of flea products? I’ve read several papers published so not sure how all this is a big conspiracy.

”do your own research” big red flag often used by those with no actual research training.

There is not a single grammatical error in my post. So please don’t waste time, looking for inaccuracies. There aren’t any. I am so sorry you struggle with lengthy passages of words. Try reading it slowly. As for the research, I did clarify that I had read up on my own and spoken with our vet and a consultant at a vetinary hospital. I was very honest about this and didn’t purport to be a medical professional. The idea was that anyone reading my post would and should make up their own minds. Nevertheless, when you have witnessed a healthy dog suddenly have cluster seizures, the horror of this, you are inclined to do some reading. I hope your day improves because you sound really fed up. Take care.

OP posts:
GeniuneWorkOfFart · 11/08/2025 18:48

I've always opted for oral flea treatments because of the wider environmental impact of spot ons - we live near a river that's a SSSI and our dog loves swimming for a start, so letting insecticides wash into the river was an absolute nope for me.

I'm not sure there's an easy answer here tbh. We have a responsibility to our pets but also to our environment and the rest of life on earth - the insect apocalypse is a real threat tbh.

Thanks for posting as I had no idea about this risk, but I also am not happy to switch to spot on treatments.
I'm going to investigate this further!

SchnozzaHoomum · 11/08/2025 18:49

K0OLA1D · 11/08/2025 18:43

Front line stopped working for my cats.

I now use advantage. Best flea treatment I've ever used.

Hi,
I think Advantage and Frontline are the two most popular safe treatments. Thank you for taking the time to comment.

OP posts:
MrsLizzieDarcy · 11/08/2025 18:53

I've not flea treated or wormed my dogs, aged 12 and 6 since one of them had a horrid reaction to a Bravecto tablet.

And since we've stopped, they've never had fleas or worms.

SchnozzaHoomum · 11/08/2025 18:53

GeniuneWorkOfFart · 11/08/2025 18:48

I've always opted for oral flea treatments because of the wider environmental impact of spot ons - we live near a river that's a SSSI and our dog loves swimming for a start, so letting insecticides wash into the river was an absolute nope for me.

I'm not sure there's an easy answer here tbh. We have a responsibility to our pets but also to our environment and the rest of life on earth - the insect apocalypse is a real threat tbh.

Thanks for posting as I had no idea about this risk, but I also am not happy to switch to spot on treatments.
I'm going to investigate this further!

Thank you. That was the only reason I posted. I am not a conspiracy theorist and grab any vaccine that’s going 😂. Once I started reading (over a long period of time) about the LANER family of drugs, I was shocked at how many dog parents were going public about their own experiences. Of course, it is each dog parent’s own choice. I was just sharing our own experience to maybe save other dogs.

OP posts:
SchnozzaHoomum · 11/08/2025 18:57

MrsLizzieDarcy · 11/08/2025 18:53

I've not flea treated or wormed my dogs, aged 12 and 6 since one of them had a horrid reaction to a Bravecto tablet.

And since we've stopped, they've never had fleas or worms.

Actually, you are not the first person to say this! Lots of people don’t use anything and never have a problem. Bravecto contains one of the LANER family of ingredients.

OP posts:
MarvellousMonsters · 11/08/2025 19:05

SchnozzaHoomum · 11/08/2025 11:56

I’m posting this because I just saw a thread from a year ago, stating that fleas become resistant to Frontline Plus, and recommending dog parents to “use the stuff the vet gives you instead”.

First of all, the story about drug-resistant fleas is an urban myth and is categorically untrue. Frontline Plus has been used safely and effectively over thirty years. You must apply it properly every 28 days. But it is extremely effective and completely safe for your pet. If you still have flea issues after use, you must wash thoroughly all soft furnishings and start keeping yoir dog clean.
My main reason for posting is the horror I felt when I saw dog parents being advised to use Nexgard / Simparica / Bravecto / Credelio.

PLEASE READ THIS BEFORE GIVING ANY MORE OF THESE DRUGS TO YOUR DOG.
I have spent the last two years doing intensive research, reading up on my own, speaking with other dog mums and dads and also with a consultant at a London vet hospital and our own vet.
All of the above four prescription-only drugs contain an active ingredient which ends in the letters, L A N E R. It might be Axfolaner or Sarolaner or something similar, but they are all from the same family. This is an extremely aggressive ingredient. When you give your dog their “tasty, chewy tablet” each month, you are topping up the significant residue that remains in their body after the previous dose. It can take months or years for their body to reach its limit. With our little schnauzer, it took four years of Nexgard for her to suddenly have violent cluster seizures. Her brain scan showed no epilepsy, and the consultant told us it was extremely rare for a dog of seven years old to suddenly develop epilepsy. This consultant also said it was “more likely than not” that our dog’s attacks were a result of the build-up of Axfolaner / Sarolaner in her little body. We took her off this stuff immediately and put her back on Frontline Plus, which worked perfectly well for the first three years of her life. Frontline Plus, Spot On and their worming tablets - NOT prescription ones, I mean the ones you buy off the shelf at the big pets’ chain store - are the safest and most effective way to prevent and kill fleas, ticks, mites and worms in yoir dog. I researched the active ingredients in these - Fipronil and (S)-methoprene. Their safety record is exemplary. Please do some reading up yourself, but bear in mind that every time you give your dog their Simparica or Nexgard, you are creating a ticking time bomb. The only reason there aren’t tens of thousands more anecdotal cases published is that vets refuse to acknowledge the connection between seizures and the drugs they make a fortune from. By all means disregard this. But I feel better sharing. We know of five dogs in our area alone whose parents believe these drugs have caused neurological reactions. Go safe, and stick to the tried and tested ones that don’t need vets’ prescriptions.

“I have spent the last two years doing intensive research”

Actual research, in a lab? Or have you just been googling?

That said I use Billy No Mates on my dog, and we’ve not had a single tick or flea.

Mustbethat · 11/08/2025 19:13

MarvellousMonsters · 11/08/2025 19:05

“I have spent the last two years doing intensive research”

Actual research, in a lab? Or have you just been googling?

That said I use Billy No Mates on my dog, and we’ve not had a single tick or flea.

Are you going to publish your research o/p?

two years is masters level, three would be a PhD. The norm would be to publish your findings in peer reviewed journals after that amount of “intensive research”.

I’m sure the scientific community would be very interested in what you’ve found.

Sasssquatch · 11/08/2025 19:18

Christ people are snarky on here.

FWIW I use nexguard becuse, as per the other poster I’m concerned about the impact on our waterways of spot on treatments so im v interested to hear this and will indeed do some research / googling, call it what you will, of my own.

our vet is very keen on minimising unnecessary treatment and had already suggested we use treatment only if / when needed. Our dog has a flea allergy so it’s a fine line to balance.

MrsLizzieDarcy · 11/08/2025 19:25

The only thing mine have is the Lepto vaccine, and I'm seriously questioning that now my older one has slowed down and stopped diving head first into rancid water. But that's another can of worms, isn't it.

Tygertiger · 11/08/2025 19:27

Using Frontline every 28 days is incredibly bad for the environment. It is excreted in dog urine and poisons insects. These pesticides were banned for use in agriculture due to their impact on bees and other invertebrates, yet they continue to be legal for veterinary use. It’s baffling and hopefully only a matter of time before they are similarly outlawed for pets. Big companies also encourage systematic overuse to make more money.

I appreciate your point OP but Frontline and other drugs are not the easy solutions you think they are, unless we want to completely decimate our ecosystem further.

SchnozzaHoomum · 11/08/2025 19:32

MarvellousMonsters · 11/08/2025 19:05

“I have spent the last two years doing intensive research”

Actual research, in a lab? Or have you just been googling?

That said I use Billy No Mates on my dog, and we’ve not had a single tick or flea.

It seems the word, “research” has triggered some readers. Research is what I did for my dissertation and for my thesis (these were linguistic, nothing to do with veterinary medicine). Research doesn’t necessarily involve a lab. It is the investigation of facts and data to help you form an opinion or reach a conclusion. I did have numerous conversations with veterinary professionals as well. With regards to the Billy No Mates, I think it’s brilliant that people try these natural anti-parasitic treatments and that they work.

OP posts:
SchnozzaHoomum · 11/08/2025 19:33

Tygertiger · 11/08/2025 19:27

Using Frontline every 28 days is incredibly bad for the environment. It is excreted in dog urine and poisons insects. These pesticides were banned for use in agriculture due to their impact on bees and other invertebrates, yet they continue to be legal for veterinary use. It’s baffling and hopefully only a matter of time before they are similarly outlawed for pets. Big companies also encourage systematic overuse to make more money.

I appreciate your point OP but Frontline and other drugs are not the easy solutions you think they are, unless we want to completely decimate our ecosystem further.

I will look into this now. Thank you . I honestly had no idea that these meds were damaging to the environment. I was solely focused on safely protecting our dog. Maybe natural treatments are the only way.

OP posts:
SchnozzaHoomum · 11/08/2025 19:34

MrsLizzieDarcy · 11/08/2025 19:25

The only thing mine have is the Lepto vaccine, and I'm seriously questioning that now my older one has slowed down and stopped diving head first into rancid water. But that's another can of worms, isn't it.

Our dog has that vaccine as well and has never gone into water. You have made me think we should stop that altogether. Thank you.

OP posts:
SchnozzaHoomum · 11/08/2025 19:36

Mustbethat · 11/08/2025 19:13

Are you going to publish your research o/p?

two years is masters level, three would be a PhD. The norm would be to publish your findings in peer reviewed journals after that amount of “intensive research”.

I’m sure the scientific community would be very interested in what you’ve found.

Maybe I will! Great idea 👍😃

OP posts:
SchnozzaHoomum · 11/08/2025 19:39

Sasssquatch · 11/08/2025 19:18

Christ people are snarky on here.

FWIW I use nexguard becuse, as per the other poster I’m concerned about the impact on our waterways of spot on treatments so im v interested to hear this and will indeed do some research / googling, call it what you will, of my own.

our vet is very keen on minimising unnecessary treatment and had already suggested we use treatment only if / when needed. Our dog has a flea allergy so it’s a fine line to balance.

I can’t believe some of the replies 🤣. People have got themselves so wound up over an innocuous post, which I only shared because of our own little dog’s experience. I’ve been picked up on lack of spacing in my post and even the use of the word, “mum” instead of, “owner”. I can only imagine these are people having a very bad Monday. 🙄

OP posts:
sandgrown · 11/08/2025 19:42

I find it hard to take your post seriously when you refer to yourself as your dog’s parents ! We used Seresto for many years and found it very effective.

Early3Rise · 11/08/2025 19:44

OP, I appreciate you're trying to help others, which is obviously admirable.

However, there isn't a one size fits all for parasite prevention and decisions need to be made on a case by case basis.

Frontline Plus doesn't cover lungworm, so please do more research before suggesting everyone starts using it.

If everyone switches to Frontline Plus, lungworm cases will soar. And lungworm can be fatal.

I don't use spot ons because of the risk of it leeching into the home / environment and I have young children.

Nexgard Spectra is the best option for me and my dog, for now.

Also, please link me your "research" stating resistance isn't an issue. It's widely known that some "mutant" fleas develop resistance to certain ingredients, whether Fipronil or another. These resistant fleas become the dominant ones, making the product ineffective. This is why, if fleas are an issue, it's a good idea to rotate the products used.

IAmQuiteNiceActually · 11/08/2025 19:45

I've never thought it a good idea to give flea treatment orally....it's bad enough having to put chemicals on their skin. I use Advantage, but very sparingly. Fleas and flea eggs do wash off...they're not like head lice.

Theseventhmagpie · 11/08/2025 19:47

Thanks for posting OP. Will be looking into this.
BTW, not that I openly admit it but my dog is a child to me 🥰

RentalWoesNotFun · 11/08/2025 19:48

Maybe the way to go is some of one type and some of the other type? I need to get some for some kind of mites that frontline+ are just not killing off