Have you decided what to do about the fleas? I was thinking... that if you haven`t applied the Advantage yet, and are still worried about applying it where you shoot on the scruff, maybe you could ask the question in your condo. There could be people who have dealt successfully with this situation that can give their 2 cents, kwim?
You could just add 'flea med application??' or some such to your subject line - and and see what people say to the question in your condo. And the weekend might be a good time to do it, when more people are spending more time on the board.
And if you already applied it, please ignore my ramblings!!
I was told to apply it on the top and just over the top (the back) of the head. That's where I still do it, to both my cats, even today, when I don't shoot in the scruff anymore. I think you just want to apply it where they can not lick it.