Topigs Norsvin sows are easy to manage, strong and produce many large litters in a lifetime. Replacement rates are low. This saves feed costs in the production of rearing gilts to replace sows culled. A dry sow that is not inseminated uses feed. Topigs Norsvin sows are known for how easy they come into heat and their high farrowing rates. Topigs Norsvin sows therefore produce more litters per year.