Quote Originally Posted by St Fan View Post
Actually, noticing that someone is dominated is simply a DC 15 Sense Motive check. Meaning it can even be done untrained, with more than a 1 in 4 chance of succeeding, better with some Wisdom bonus.
And that's assuming the DM doesn't just let you use a Take 10 (or Take 20, if untrained) to keep the game moving.