I'm not being a snob, but I've never had an issue with fleas until we moved into this house. My cats are indoor only and the dog only likes to go out to potty and go for walks, but other than that she's in the house with use. This house had been empty for a couple of months and I'm thinking there were some fleas in here. I didn't think they could live that long without a host, but according to the vet they can. Jewel (the dog) started scratching a lot, but the furnace is running and I figured it was dry skin and added some oil to her food. Til I had a flea jump on me in bed. LOL I lived in the south before products like frontlilne were available so I know all about what it takes to maintain flea control. It was a constant battle in Georgia. But, since I didn't recognize it for what it was it's gotten a little out of control. Anyway...I picked up some frontline this morning from the vet. I checked with the vet first to make sure it was ok for little Abbey with her kidney disease and he said it was as it's not broken down by the kidneys. So, I get home and first did Jewel, then Abbey, then Puddles, then Baby Kitty. Within minutes - literally no more than 3 or 4 minutes - Abbey starts acting very strange. Licking her mouth a lot, licking her paw then jerking to a stop, trying to scratch then jerking to a stop, jumping up in the air and running around. Looked like she was trying to get away from something. So, I called the vet and they said that there are very few reactions with frontline; that it was likely that she had active fleas and when I applied the frontline they started to scurry and it was making her nuts. She said if I wanted to I could wash it off. I waited about 10 minutes. By this time she was curled up under my nightstand, her eyes at half-mast and I could just tell she wasn't feeling good at all. Abbey never hides under the furniture either. So, I had easy child get her and hold her while I washed it off. Now I know she wasn't feeling good because she doesn't like to be held, but she didn't resist at all. And I was very thorough in washing it off without no complaints from Abbey. Immediate difference. She perked right up and was fine. So, I'm thinking it burned her skin rather than a reaction to the pesticide as she wouldn't have bounced back so quickly. The vet recommended Advantage because it doesn't have as much of the chemical in it (it doesn't kill flea eggs.) I'm just wondering - after this long story - if any of you have had a similar experience and then have gone on to have luck with another product. I don't want to put her through this again and I really can't afford to spend the money if we can't use the product. If that's the case, I'd rather just get a flea comb and pick them off her one by one. I also got a spray from the vet to do the carpets and I'm leary on using it now. Even though I would keep the animals off the sprayed area until it was dry, she seems very sensitive to things.