I got some Advantage II last time instead of the regular Advantage. For clarification, I always get the purple package, as all the cats are over 9 pounds.
I got a pack of 12, which covered the cats for 2 months with 2 applications left over.
I'm not really happy with it. The regular Advantage kills the fleas. Advantage II also kills the larvae and eggs, which is why I got it. But it doesn't seem to kill the fleas (full sized adults) as well.
I have carpet, and the fleas live in it - they lay eggs and the carpet is full of eggs now. Even after multiple vacuumings, it seems we are inundated with fleas. It's even worse since I applied the Advantage II.
I'm using my premise spray (Siphotrol) and salt. I tried the diatomaceous earth, but it plugged up my vacuum so bad that it stopped working, and I had to fix it. So, I'm back to salt.
That's my report. If things get better, I'll let you know.....