^reacting to Post #12: First, define what a good FG% is. Does a FG% better than the opponent's immediately fall into that definition, or should there be, say, 45% FG? But I think the op was asking what constitutes a live dog, specifically. My own way of playing it is if a dog is winning at the half (regardless of whether it covered game line or not) and it's still given a plus that is more than half of game spread for 2H, then I'd say the books are expecting the dog to get hammered after
halftime, or at least a comeback by the fave, so for me it's either a wager on the fave ATS or stay off. Matchups figure into my decision, so the choice really varies from game to game.