LAUSR

Piglets are susceptible to chilling early after birth, which is a major pre-disposing factor for pre-weaning mortality (PWM). This study evaluated the effect of drying and warming piglets at birth on PWM at a commercial facility. A CRD was used with 802 sows (litters), allotted at start of farrowing to 2 treatments (applied at birth): Control (no treatment); Dried+Warmed (dried with a cellulose-based desiccant and warmed in a heated box for 30 min). Piglets were weighed at birth and weaning; PWM was recorded. The effects of farrowing room temperature on PWM were evaluated by classifying litters as being born under Cool or Warm conditions (< 25° C and ≥ 25°C, respectively). Similarly, effects of birth weight on PWM were evaluated by classifying piglets into 3 Birth Weight Categories (BWC; < 1.0 kg, 1.0-1.5 kg, or > 1.5 kg). PROC GLIMMIX and MIXED of SAS were used to analyze PWM and other data, respectively. Litter was the experimental unit; piglet a subsample of litter. The model included fixed effects of treatment, and farrowing room temperature or BWC as appropriate, and the random effect of piglet within litter. Rectal temperature at 30 min after birth, measured on a sub-sample of 10% of litters, was greater (P < 0.05) for the Dried+Warmed than the Control treatment. There was no effect (P > 0.05) of drying and warming piglets on weaning weight or overall PWM. Additionally, PWM was similar across treatments within each BWC. However, the Dried+Warmed treatment reduced (P < 0.05) PWM compared to the Control under Cool but not Warm farrowing room temperatures. In conclusion, this suggests that drying and warming piglets at birth increases rectal temperature and may be an effective method to reduce piglet PWM under cooler farrowing room temperatures. This research was funded by the National Pork Board.