Emerging Roles of Heat-Induced circRNAs Related to Lactogenesis in Lactating Sows

Effect of Heat Stress on Lactating Sows

Ringworm in lactating sows

A 100-sow farrow-to-feeder farm with an outdoor gestation lot had a 4-year history of ring-like skin lesions in lactating sows. On average, 90% of sows in each 5-week batch developed lesions within a week of entering the farrowing house. Lesions beginning as 2to 3-cm circles of dark, crusty skin coalesced into larger areas on the back, sides, and ventral abdomen. No etiologic agent was identifi...

Evaluation of high nutrient diets on litter performance of heat-stressed lactating sows

OBJECTIVE The present study investigated the litter performance of multiparous sows fed 3% and 6% densified diets at farrowing to weaning during summer with mean maximum room temperature of 30.5°C. METHODS A total of 60 crossbred multiparous sows were allotted to one of three treatments based on body weight according to a completely randomized design. Three different nutrient levels based on ...

Genetic Analysis of Feed Intake in Lactating Sows

Records for daily feed intake during lactation were available for 774 sows with 2,234 litters farrowing from May 2002 to November 2006. Genetic parameters were estimated for whole-oflactation feed intake and feed intake averaged over 5-day periods during lactation. Estimates of heritabilities and the permanent environment of the sow were 0.16±0.05 and 0.18±0.04 for total lactation feed intake a...

Housing of farrowing and lactating sows in non-crate systems