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.

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.

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

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 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.

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.

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.

I have used Sentinel Spectrum and it doesn't prevent fleas. My vet added Bravecto (every three months) in addition to kill adult fleas and it doesn't do that job either. One of my Dachshunds is allergic to fleas, so having been prescribed two flea prevention medicines that supposedly work by the flea first biting the animal seems ludicrous to me. I am done paying exorbitant amounts for flea protection that doesn't work. I am going to use products over the counter that repel. I am also sick of paying pest control to kill the fleas in our condo. Our two Dachshunds are house dogs and only go in our bricked in courtyard or on walks with me. There is no reason for this. Pulling my hair out in Toledo, Ohio.

After giving this product to my mini doxi for 3 years something has changed. She never had a
Problem til now. Severe hives, depression and some diarrhea. Three days later she is still depressed. This drug is not worth the anxiety for me or for my baby. She will have natural things from now on. Remember this is a DRUG from DRUG companies. And in addition after years on this product such as any drug what does this do to their kidney's and other organs.

I so regret buying this and switching from Revolution. My dog hates the so called "treat" and every month I have to think of ways of getting him to eat the darn Thing. What's worse is that my dog also got fleas. This expensive thing does not work. Switching back to Revolution now.

The product claims to protect against hookworm, roundworm, and whipworm. But it doesn't. My dog has been taking for 2 years and just had a positive fecal test. I called Verbac and they said it doesn't protect against infection, but it kills worms after the fact, but only for about a day then it's out of their system. When pressed she said it's not 100% and they could need other treatment, but it is enough to market it as a preventative. Unbelievable! I told her I would find something that actually worked and all the woman said was "okay, have a nice day!" The company doesn't back the product, or care about customers. Overall a waste of money.

If your dog won't take the medication as an entire chew, they are easy to cut into little pieces and then just mix them in with their food. My 10 and a half year old Shih Tzu has taken Sentinel for years. It is effective. Search on the internet for the best price.