Due to dramatic improvement in average daily gain, Big Sky Farms decided to improve and expand its gilt development and stimulation programs. The development of their 5600-sow barn saw a new gilt development area. Gilts are purchased at 150 days and intensely stimulated (twice a day) after arrival (housed in groups of 10). 50 gilts are bred per week out of 100 being purchased with no royalties to the breeding company for culled gilts. Gilts are fed on a high quality gilt breeder diet and moved into a breeding stall at first estrus until breeding at second estrus. At weaning, first parities are moved back to the gilt breeding stalls designed with capacity for a 10-day wean-to-service interval. 60 ft2 pens were also constructed in order to house cull sows and gilts. The feed system disperses 4 unique diets for gilt development and breeding, gilt gestation, sow gestation, and lactation.