Purpose of Riding Test in Sows

The 'Riding test' in sows is used to detect:

Correct Answer: Heat (Estrus)

The Riding test (also called the Back Pressure Test) in sows is used to detect estrus (heat). A sow in true heat will exhibit the standing reflex (Wehrenberg reflex) — it stands rigidly and immovably when a person applies back/flank pressure, mimicking a mounting boar.

How the Riding Test Works

1. The handler approaches the sow from behind and presses both hands firmly on the sow's back/hindquarters.
2. A sow in standing heat will stand stock-still (positive test = in heat).
3. A sow not in heat will move away or show resistance (negative test).

Enhanced Detection with Boar Exposure

The riding test accuracy improves greatly when done in the presence of a boar or with boar pheromone sprays. The pheromone androstenone from boar submaxillary glands triggers the standing reflex in sows.