Bests & Worsts Reviews from Amazon

Every flea treatment is hit or miss with cats, and people complain about the weirdest things, as if these spot on treatments are supposed to radiate some noxious "force" that keeps fleas away. Yes, you're going to see more scratching on the cat after putting this on it. The poison irritates and excites the fleas until they die. This also means 1) you MIGHT see a stronger presence of fleas because they're not expertly hiding deep in the fur or under the armpits or where they usually aren't seen at all, given that their systems are out of whack, and 2) the fleas become more aggressive and bite more, leading to more irritation on the pet. Not only that, but some felines are just flat out allergic to this stuff, and so you take a risk when you go buy things yourself instead of going to a vet. Finally, yes, this product may stop working--fleas build immunity to things just as any other living creature builds immunity to things. Life will always find a way, and this directly targets critical life stages of the flea. When fleas may lay QUITE a lot of eggs in its lifetime, even at 0.01% survival rate, that's more than enough for millions of fleas in a few weeks. You need to switch up your flea medication from time to time. There's a reason doctors will switch up your antibiotics if you have to take a bunch of those. Anyway, this stuff is pretty effective, but it loses 1 star because I'm not convinced yet that this actually fully penetrates the fatty layer in the cat and stays active for a whole month. It seems like after 2 weeks to 18 days or so, it's done. I know this because I've removed fleas at various days with a comb off my cat to see how effective these things tend to be over time. Within the first 2 weeks, all fleas I caught were just dead when I went go check on them later after getting them together. After 3 weeks (21 days), though, every flea was still perfectly fine. Also, my cat gets pretty itchy from irritation after I put it on her. HOWEVER, I ACKNOWLEDGE THIS AS MY CAT'S OWN PERSONAL SENSITIVITY TO IT. She's sensitive to ALL of the spot treatments because it's literally "the skin is absorbing and storing poison." I personally use this flea treatment program to kill fleas: 1) Put on spot treatment 2) Pop in a Capstar the same day, same time as spot treatment 3) Spread food grade diatomaceous earth around the house. Sprinkle some so you get blotches all over the floor, then sweep it all in 4) Spray down the baseboards with a house spray (about 3-4 bottles total to really saturate the base boards) 5) Vacuum every 3 days, laundry same time (whatever I wear and whatever the cats have gotten on) 6) Spray sofa and cat sleeping areas every 5 days Takes 3 weeks of aggressive work, but they'll be gone before the month is over. I live in the Deep South in a poorly sealed trailer with a giant tree and a lake nearby; you bet I'm getting fleas every single spring and summer.