The current NRC Swine (1998) recommendations for Ca and P
feeding levels for gestating sows are primarily based on data for
stall housed sows. Additionally, much of the literature on Ca and P
requirements is older and may not be relevant to the modern, high
producing sow. A trial was conducted to determine if the current
recommended feeding levels of Ca and P during gestation are
adequate for high producing sows housed in stalls or groups. We
found that the current recommendations are adequate for group
housed sows in a non-competitive group housed situation. We also
observed increased performance in the group setting, with group
housed sows giving birth to larger litters and heavier piglets.