if your a favorite and getting plus money (+ juice) its normally a sign the other side is getting pounded and the books are begging you to take the + money favorite
i still think if u have a favorite at -3 and the other side is getting hit hard, instead of going to -3 +110, dropping down to - 2 1/2 would get more bets on them (when its more than likely the wrong side than the little + juice)