Abstract: A hog farrowing house and pen is provided which is especially designed to promote the safety and healthful development of young pigs, and to significantly lower pig mortality. The house and pen structure is relatively compact, can be moved at will, and provides separate areas within both the house and pen for mature sows and pigs. The housing structure includes upright sidewalls and an oblique back wall cooperatively defining a safety zone for pigs which prevents their being smothered or crushed by a nursing sow. The front wall of the house is provided with separate sow and pig doors which lead to separate enclosed pen areas. Shelter for each door is furnished by a forwardly extending wall, and the latter includes a selectively coverable transparent panel above the pig door for presenting a sun-warming area for young pigs.