The ram effect: an archaic tradition When it comes to tupping season, the so-called “ram effect” is one of the oldest and most successful tricks in the book. Sheep farmers have probably been using this breeding technique since the first ovines were domesticated by humans about 10,000 years ago. The ram effect is, in short, a reliable, low input and completely natural way of ensuring that all the ewes in a flock come on heat within a short period of time. This in turn will ensu...