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2 Pat  · Very expensive – Not worth the price if you cannot receive a rebate. Paid over $100 for 12 months and was denied rebate because purchased at a warehouse.
1 jam  · Doesn't even work!!!! – This doesn't even work on my puppy! Glad I know before I start buying this. I had one free tablet for the puppy.
1 No More Sentinel  · Horrible Product – What good is a tablet the dog won't eat. This is too expensive. No more Sentinel for my pets.
1 Nadds  · Horrible – Gave this to my puppy and it made her very sick, within 15 minutes throwing up everywhere. Poor baby, can't be good for them!
Marva D
Marva D3 posts
  Top Review Yellow

Will Not Give To Dog Again – My daughter gave her dog this tablet about a month ago. A few days after giving the tablet to her dog, she became lethargic and would not eat her dog food. My daughter mentioned that her dog usually takes the tablet without any issues but this time she would not take it. She placed the tablet in her dog food, but she would not eat from her bowl for days even after after removing the tablet and cleaning the bowl. 2 months later, I spoke with a dog owner who said her Chihuahua had to go to the vet after taking Sentinel. She said he would throw up and had seizures and that lasted for a week. I told my daughter not to give her any of the remaining tablets.

Purchased in .

  • Pet Type: Dog
Ease of Use
NatNat
NatNatSA40 posts
  Verified Top Review Blue

Easiest method to avoid Heartworms, Intestinal Worms and Fleas – Feed it to your dog with a full meal just like a treat. My dog would not know what a flea was, and has never had intestinal worms. Easy, quick, fuss and mess-free this is the simplest method to keep your dog Heartworm-free and never know a flea. It is a once-a-month chew, and the dog loves it. The product is highly efficient, and you will never have smelly or sticky fur on the back of their neck again. My Belgian Shepherds have never experienced nasty side-effects and each month they all think that it is "treat time". I have used this product since its introduction to the Market and have never had a problem.

MJP
MJP
  Yellow

NOT CHEW-Y – ****opinion based on palpability: not any side effects*** My pup has been on *regular* Sentinal TABS for Years. Recently I switched to CHEWS (assuming) would be easier & quicker for dispensing. NOT!!! :-( They are little "bricks" which I dampen with water then cut up so my pup will even swallow!! (NO, they haven't expired) Our 2nd pup… Read more

was given a HeartGuard RX by our Vet >>>those ACTUALLY are CHEWY and crumble in my hand. ^^^So in 3 months I will stop Sentinal and switch to HEARTGUARD!!! :-)

Paul
PaulSA9 posts
  Yellow

Effective but expensive – We have used Sentinel Spectrum from the get go from when our Kelpie was a young puppy with no known side effects. She has remained fit and well for the 9 years of use. I beleive it is very important to know your dogs weight and use the drug accordingly. If your dog has only just reached the lower weight range then cut the pill in half etc and work… Read more

upward. So if 11-22kg and your dog is 12KG, cut it in half. I see too many comments for side affects, and have often wondered if its a first use / change in pill weight range. Give your pups the lower dose and work up to where your weight range is. Chat with your vet / before use. They should know what works well for which breeds and weights etc. Don't guess on your best mates health. PS, no fleas ever seen, and hope we have no heart worm either.

Chello
Chello
  Green

My dog different and still has fleas – I have I guess a rat terrier, chihuahua. 5 yrs old. He got fleas. We gave him the medication. 2 weeks later noticed a swollen spot. He eventually gnawed on spot. Now a spot no hair. My dog still has fleas. He's bathed often now. Other bare spots appeared. Never in his life has he had this. I'm concerned my dog is suffering. Medication is not… Read more

working. He's been different since we have given him the medication. He doesn't eat like he used to. His behavior is different.

In-depth reviews

MarkMelbourne
MarkMelbourneVIC86 posts
  Blue

Convenient and effective IF you control adult fleas first – I see some reviewers are frustrated as they expect this product to kill adult fleas, which it does not. The product purpose is to break the breeding cycle: when an adult flea lays eggs, they can't hatch. It's unavoidable that your dog will get fleas from other dogs, fleas jump on from the grass, flea eggs at home will hatch up to a year later. The… Read more

key is to stop these odd few fleas becoming a plague, this is what you are paying for, and this is why you use it over the long term on dogs that don't have fleas. The worming part is a bonus, and it works well.

So if you have a current flea problem you must kill the adult fleas - most effective method is wash your pet with a Permoxin based product twice a week until all the adult fleas are dead. Inspect your pet thoroughly to find out. Mandatory to treat all bedding with the same chemical, and flea bomb your house too. It's such a chore but there are no shortcuts to eradicating a plague of fleas. With adult fleas now under control, Sentinel Spectrum will help you keep it that way.

Austin
Austin
  Yellow

Seizures – Ever since my German Shorthaired Pointer was 3 moths old she was given Sentinel. At about 4-1/2 months she started having seizures. From that age until she was about 3-1/2she would have 8-12 petite mal seizures a year. Sometimes having cluster seziures (more than 10) in a single week. Ranging from a minimum of 30 minutes until a maximum of 1-1/2… Read more

hours. YES a minimum of 30 minutes. My vet diagnosed her as epileptic. I tried tons of different things, I received second opinions and even tried anti seizure medication and a range of different dog foods and vitamins. I recall suggesting my concern several times that sentinel could be causing the seziures. Both vets insisted that it was a safe product and it was extremely unlikely, and they were positive that Sentinel was not causing her epileptic episodes. After a while I gave up and didn't know what to do. Out of desperation I tried one last thing against my Dr's advice and stopped giving my best friend Sentinel and started her on Heart Guard. It is been almost 2 years and she has had NO seziures and lives a completely normal life. I'm sure for some dogs Sentinel is safe but the bottom line is, it was not safe for my dog. Sentinel can cause seziures and don't let anyone tell you otherwise.

Amanda J
Amanda J
  Tasty Chews

Love it! – I am reading through these reviews and keep catching myself shaking my head. This medication is PRIMARILY for heartworms which is MOST important for your pets. In addition to intestinal parasites which could also be harmful to your pet. Please take the time to read what all is included in a product when administering it to your beloved fur… Read more

babies. The medication works as a birth control for fleas. Therefore there will not be an investation of fleas in your house. It doesn't guarantee that your pet will never have a flea on them while taking the medication but will however stop the flea cycle so you don't see tons of fleas in your house. A flea doesn't have a very long life cycle. So, yes you may see a flea or two on your pet but if you are giving the medication with food and continuously every month that flea will die within the next couple days. If this is a concern to you or your dog has bad flea allergies when they are bite by them then yes by all means add in a topical or another tablet for the adult fleas. I work at at veterinary office and literally explain this to people day after day which is completely fine. I 100% understand someone not being completely sure about the heartworm prevention and the difference between all the preventions on the market. However, I do find it very ignorant for someone to write bad review on a prescription when the supposed facts you have listed are incorrect.

Positive reviews

Spectrum
Spectrum
  Blue

A 5 star product for 2 of our 3 dogs!!! Our third will not eat the Sentinel Spectrum – I’m not sure of what to do to get this girl to take her Sentinel. I’ve tried pockets, breaking it up. Grinding it up, etc. Is there another alternative? Help!!! Show details

Lelley
LelleyWA24 posts
  Verified Yellow

Great product .. works well – I have used this on my Beagle for 8 yrs without any issue .. Seems to work well and never found any fleas as yet .. she swallows it whole though not sure if that makes any difference ?  Show details

kgn
kgn
  Yellow

Do not give to Australian Shepards .IMO – I have heard specific (anecdotal) reports saying it is potentially deadly for that breed. It is suspect in our niece's Australian Shepard's death, as well. That said we have given it to our three standard poodles and a husky/shepard/dobie mix successfully. Raw meat, butter or cheese is their preferred camouflage. Not peanut butter. Show details

Negative reviews

Mary
Mary
  Verified Yellow

Extreme anxiety for my dog – I have use Sentinel Spectrum for small dogs on my dog ( a Cavalier King Charles Spaniel) without any noticeable problems, and been happy with the results(no fleas). As my dog gained weight and reached 11 kg I gave a treatment for a medium dog. I didn’t notice any problems for 24 hours but after that my dog has been sleeping constantly, salivating… Read more

excessively, chewing at his feet, refused to eat for two days. It is now 5 days since he had the dose and he has still not recovered. When I looked at the size of the doses for small and medium dogs, there is a huge difference in strengths. I can see my dog has been poisoned by having far too strong a dose. I found the advice about problems put out by the manufacturer to be totally inadequate and unhelpful. I am clearly just going to have to wait for weeks or longer for the drugs to clear out of his system.

Heart & Intestinal Wormers

Find out how Sentinel Spectrum Tasty Chews compares to other Heart & Intestinal Wormers

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Diane B.
Diane B.
  Blue

Obviously tastes terrible – Mixed it with yogurt and her food but picked it out, have given this product for years to my Rotties but my new Rhodesion Ridgeback hates it, which means pushing it down her throat. Show details

Mad dog
Mad dog
  Yellow

My dogs hate it – I have 3 dogs that are NOT picky eaters. They will not touch these things. They will lick peanut butter off of them. I've wrapped them with cheese. Nope. Nothing will get them to eat them.

Recent reviews

Bobloblaw
Bobloblaw
  Blue

Terrible and a waste of money – I bought a 6 pack of the Sentinel spectrum chews. My dog eats almost anything, even poop, but she won't eat these things. I had to slather the chew with peanut butter for her to take it. The chew then made her so sick that she threw up. What a waste of money. Show details

Dog lover
Dog lover2 posts
  Verified Green

Frightening Reaction – My 14 year old pomeranian had a terrible neurological reaction. Extremely restless, vomited, had a dazed look, back leg twitched, at times collapsed, symptoms bad for a week, dissipated after 3 weeks. Show details

KateRiley88
KateRiley88VIC8 posts
  Blue

Made my dog lethargic and not eat – The day after I fed my border collie a sentinel chew, he stopped eating for two days and stopped drinking water. He had diarrhea, was really lethargic and not his normal self. Took him to the vet and he was really dehydrated. They gave him a nausea injection and $370 later for a weekend emergency appointment after hours he was eating again. Do not feed this to your pets. Show details

Cathy
CathyVIC4 posts
  Blue

Sick dog – I gave this to my Aussie Bulldog for the first time last night and she has been vomiting ever since. She keeps arching her back like she has a sore tummy and is lethargic. So annoyed as this cost $140 for 6 months worth and we won't be using it again. Show details

Linda McMahon
Linda McMahonSA12 posts
  Green

Terrific product and well-priced – I have been using this product on my Maltese Poodle for a few years now and never had an issue. She has never had a negative reaction to the product and gobbles it up each month just like a treat! Gives me peace of mind that she is protected from nasties. Show details

Steve Little
Steve Little119 posts
  Verified Green

Effective but expensive – Our small dog has had no issues since using this product. We have to wrap the pill in ice-cream for him to eat it though and this is OK as its once a month. The RRP on this is outrageous and with an automated on-line search I can still get it for around $13 per pill buying packs of 6 or 9. The dog does still get the occasional Tick and we have to inspect him every day basically for Ticks. No issues with Spectrum other than the cost. Show details

Melinda
Melinda
  Tasty Chews

This is an awful medicine that made both our dogs sick – Our bigger dog 50 lbs is very lethargic and not acting her normal self. Our little dog 10lbs has had bad diarrhea and extremely lethargic. Neither dog is acting normal. Show details

Heart & Intestinal Wormers

Find out how Sentinel Spectrum Tasty Chews compares to other Heart & Intestinal Wormers

Know better, choose better.

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Joy
JoyWA4 posts
  Green

dosn' t work on fleas – Maybe it works on worms but didn't seem to have any effect on fleas. It says on the packet it will not kill fleas but prevents re infection. Both my dogs had fleas during treatments. "did the dogs pick the fleas up from outside"? well the fleas today were tiny so seemed to be new borns. I am going to change products but in all fairness we have people visiting us everyday with their two dogs and have cats so maybe impossible to control xx Show details

Hilary
HilaryQLD12 posts
  Yellow

Excellent Product – I have used Sentinel Spectrum for many years and have seen zero side affects. The product works well and we not had fleas or worms. I highly recommend it from puppy through to an aged dog. Show details

Daisy
Daisy
  Green

Never use this for your loving dog! – I gave this to my dog on December 31st because I was off of work and like to monitor a reaction, of any. From this day on, and it is now Jan 8, my dog has rarely had anything to eat. One side affect of this drug is anorexia. I have never experienced this issue with my dog and would appreciate further studies to determine if this drug is safe as I… Read more

really dislike the idea of having further vetenary bills on top of what this medication costs. So, the manufacturer needs to put out a warning to dog owners and veterinarians that this is a big problem.

Chloe
Chloe
  Blue

Been using this for years its amazing! – Have used this product for years on my boxers, works AMAZING!! For people that are rating this product down because their dog has had seizures.. Your dog would have had an underlying issue beforehand. As the product states on the packet you should be consulting with your Vet to make sure your dog does not have heartworm before using the… Read more

preventative medication.

ANDDD if your dog has fleas before using this product it ALSO states it only kills flea larvae and eggs not adult fleas (there are 4 stages of fleas not just eggs and the adult flea)... so if your dog has fleas you actually need to get off your bum and remove them not leave it to a little pill to try and solve your dogs issue for you... seriously people its a preventative medication.

BeagleBagel
BeagleBagel
  Yellow

Have always used Sentinel, but no more! – We’ve had our mixed breed on Sentinel his whole life (8 yrs), and we are suddenly having a flea problem. He doesn’t have a history of fleas. I don’t know if the formula changed, or what happened, but lately it seems that the Sentinel isn’t even stopping the cycle. If I have to buy a separate pill for fleas, then what is the point to keep buying this?

Helen
Helen
  Green

Side Effects – I gave this product to all my pugs and one had a terrible reaction. The next day he acted lethergic and would not eat. Within 24 hours he was having trouble walking with issues in his rear. After 300.00 at my vets and 3 different meds it took him a whole month to come back. It hit his nervous system hard. I will not take the chance of it hurting my other dogs so will not give to any of my animals again.

Lorna
Lorna
  Yellow

Seizures after single use – My healthy happy 7.5 year old english bulldog started having seizures 8 hours after first dose. 2 months later she is on seizure meds and still suffering. Terrible chemical.

Jenni
Jenni6 posts
  Orange

brilliant, easy to use – Have used this product for the last 6 months on my puppy, it’s amazing, use every month and he’s never had any problems regarding fleas or ticks. 100% would buy again.

Linda S.
Linda S.
  Green

Used for 15 years oldest dog – Used on two dogs since pups. One lived until age 15. The 12 year old Havanese is still with us. The loved their monthly treat. Never a flea in 15 years. No health problems whatsoever. We used Sentinel Flavored Tabs.

Shannon
Shannon
  Orange

This made my baby girl not want to eat her food – I really hate to be negative, but this medicine made my 10 lb morkie not want to eat her food. She was lethargic and has thrown up several times soon after having the medicine. After the first dose she seemed a little lethargic. The last couple of months her reaction has gotten worse after each dose. After reading the reviews I can see it is… Read more

not just my imagination or just my sweet Lola. I am going to have to throw the rest of my medicine away.

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