Moving back to Frontline....
The thought of K-9 Advantix repelling fleas, ticks PLUS biting flies really appealed to me. I was a bit nervous because my youngest Chihuahua was only 11 weeks & 2 1/2lbs & I'd read about some reactions. Well the only reaction I saw was eye irritation (all 3 of my dogs woke up with eye goobers the following morning after application of K-9 Advantix BOTH times I used this product) Also, I applied in the morning & that evening I took them outside for a little romp & brought them inside & noticed a few black fly bites on their stomaches. My dogs have NEVER had fleas & 2 weeks later I noticed them scratching & saw fleas on them! I swear this Advantix stuff doesn't repell, but attracks fleas. I've had better luck with cheap store bought flea/tick repellant than with K-9 Advantix. Frontline...here we come!

K9 Advantix
So far I have put this product on my dog twice and she still has a problem with fleas. not satisfied with the product.
thanks

Good but use with caution
I used this on my 3-lb pomeranian after he was 8 weeks old. He vomited that night but I didn't think anything of it. A month later, the night after another treatment, he vomited again. I asked my vet who said that a small minority of dogs may have a reaction to the permethrin. My dog's reaction was fairly mild, but she recommended that I go back to Frontline.

I went back to Frontline, no problem.

When I ran out, I decided to try the Advantix again. My dog was about 1 year old and about 4.5 lbs. No problem whatsoever.

I did some research afterwards and read on the internet somewhere that Advantix is not recommended for dogs under 3 lbs. But I can't seem to find that anywhere now.

Anyway, I'm sure Advantix is fine for most dogs. It seems to be fine for my dog now, but I'm still wary and think I'll prefer to use Frontline.

Great product for my small dog
I have a 8.5 pound Shih Tzu-Brussels Griffon mix (long hair). I love that this product protects Sophie from fleas, ticks, and mosquitos. It goes on easily (apart from a small greasy spot on her back that lasts a few hours) and protects throughly. I usually put it on her at bedtime to give the medicine time to penetrate and avoid putting my hands in it when I pet her. I have never had any trouble with it making her sick or failing to keep away insects.

The Amazon price beats PetMeds and my veterinarian!

Never had a problem - or a flea!
We have a 5 lb. (fully grown)teacup poodle. We've been applying Advantix to the back of her neck once every 30 days for years. No problem with spreading. She's never had a reaction - or a flea. We've tried other products, and they just do NOT work.