I get so tired of people saying that Advantage doesn't work. First, look up info about fleas, and their life cycle. All stages of the flea must come in contact with advantage for it to work. So you put it on your pet, which kills all fleas currently living on the pet. But what about all the ones living in bedding, furniture, carpet etc in your house? Some advantage crystals will drop throughout the house, but basically the fleas in the house must jump on your pet to be killed. This is why people start complaining after about 2 weeks, that Advantage doesnt work. The fleas on your pet already layed eggs in your house, before you treated the pet. Now the eggs have hatched and matured. So they jump on your pet for a snack, and get zapped by the Advantage. But maybe they already layed eggs in the house, and the cycle continues. Advantage will stop larva and eggs from maturing and kill them. But they have to come in contact with the Advantage. Unfortunately fleas dont lay ALL their eggs on your pet. Using only Advantage will eventually stop the cycle, and kill all the fleas on your pet and in your home. But it's going to take at the very least 2 months, maybe longer depending how many fleas are in your home. If you are seeing fleas jumping other than just on your pets, you may want to give the Advantage some help by killing the eggs and larva before they become fleas. I recommend using a spray that is safe to use on dogs and cats. Make sure it is safe for any pets you may have in your home. I have always used Adams flea spray for cats. That way i know its safe if my cats come in contact with it. Make sure it says, safe for use on pets. Some flea sprays are made for the house only, and not for pets. Which i find ridiculous, because where do you put your pets while it dries? (Especially if you have 6 cats like me lol) And how can you be sure every spot you sprayed IS dry? Hence the reason i dont use any products in my home, if they are not safe for dogs, cats, and children to come in contact with. Or you can wait it out, in which the Advantage will rid you of your flea problem. But it may take a few months, depending how bad of a infestation you have. But you have to apply it every month on time. You can even apply it early. I have treated mine 2 weeks after the first treatment, because of a sudden bad infestation. Advantage 2 is extremely safe. (Not to be confused with ADVANTIX, WHICH WILL KILL CATS if they get a drop on them). ALWAYS ALWAYS read entire labels of any flea/tick product you are going to use on your pets, or in your home. I worked in veterinarian office for 8 years, and I use nothing but Advantage on my pets. I used it before I worked there, and always have found it to be safe and reliable. That is if you use it properly. Honestly you can IGNORE the bad reviews for this product. Those people obviously don't understand how the product works, or the life cycle of the dreaded flea! Good luck.

Works well. These last 2 batches not so much. Must stay on top of it. The liquid stays wet for about two days. The animals hate the smell, and I dont blame them. Its not horribly strong, but im sure it is to them. Haven't had any bad reactions with the dogs.

Dosage was a little weird with some left over, smell was potent but understandable, our dogs seemed just fine after, lasted through the summer!

Excellent avantage for extra large dogs works Fast removes fleas and keeps protección lasting forweek highly recommended removes fleas and keeps my dogs

I’ve been using the Advantage brand for many years now. They are a reliable and trustworthy brand that I can count on to keep my dogs protected year round. I have a large grassy backyard with many trees that have been known to have Ticks in during the summer months. I’ve never once seen fleas or Ticks on my dogs thanks to this product! This is a family favorite that I’ll be using for years to come!

I strongly do not recommend this product. It doesn’t work at all. Zero results! Petco sells package with 6 doses for almost $70, the biggest set only. Why I forced to buy 6 doses if I need only one that should work? I’ve talked with cashier after I back to the store for shampoo, she said yes, it doesn’t work in 2025. Why this product is still in your store in November? For me it’s completely waste of money. We had to buy another drops that cost $16 and we fixed the fleas with one dose.

I've been using it for 9 years or so my dogs never have flaws or does the house and yard.

Anyone that rates this more than 1 star is a bot. This does not work AT ALL. My poor boy is getting bit relentlessly 2 weeks later. This does ABSOLUTELY nothing.