I thank you guys for your advice. In the end, I figured I could rely on the basic rule of cats: if they don't like anything, they get up and walk away. When I was first starting out and not so good about sensing energy, that's how I'd tell they'd had enough. So, with that in mind, I began meditating. Sure enough, Merlie, my big bad tomcat, appears out of nowhere and curls up in my lotus position (he always shows up when I meditate--he likes the energy?) I said, well, here goes, and began the attunement.
He sat through it like a little doll. Of course I snuck in a few kisses on his paws after drawing the symbols, which is not STRICTLY part of the attunement ritual, but I figured the reiki guides would understand. He LOVED it. He fell asleep for about an hour, and when he came to my lap later that night and began kneading me into a pulp, his paws were noticeably *warm*. I'm not going to run around and attune the rest of the guys, but he really seemed to enjoy it. And it was nice to get some direct feedback that it actually *worked*.
swordqueen