During warmer periods, all sows tend to eat less. However, their piglets require the same amount of energy in order to grow. This means that sows have to rely on their body reserves even more. When these heavily emaciated sows enter the breeding stable, they will come into heat poorly and will be served with great difficulty.
When these sows eventually do farrow, they will produce smaller litters with weakened piglets. With Lianol added around weaning or during lactation, the IGF-1 level will rise, causing the sows to come into heat sooner and to be re-served less.