Tinks W6330: Sow-in-Heat is one of the best possible boar attractants. It enhances the breeding urge for the boar and increases his level of aggression towards other breeding boars in the area. Sow-in-Heat product is collected from sows during their estrous cycle and is just the right draw to out that smart old boar. Taken from sows in their estrous cycle. Attracts boars. Used around your hunting location and in hog traps.