Abstract
Although extracts from animals have been used for many years by humans to conceal natural pheromones, it has only recently been realised that pheromones can be used to improve the productivity of farm animals. Terrence Knight reviews the work on pheromones that has been done so far on farm animals. Oestrous sows have been identified for artificial insemination and ewes stimulated to ovulate by means of pheromones. In the future, it might be possible to get ewes to more readily accept foster lambs by masking the odours of the alien lamb by pheromones. A pheromone which induced early puberty in heifers could have commercial applications.
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