Pre-weaning mortality is the major cause of production loss in the farrowing area with around 80 per cent of piglet losses occuring in the first 72 hours after farrowing. These losses are often due to a lack of colostrum. Mortality rises with increasing litter size, and as such, piglets will often need to be fostered to ensure they survive. Guidelines for Fostering: Getting the “one per centers” right is a manual which will assist farrowing house staff in the everyday tasks impacting the successful fostering of piglets.