I visited the farm and took photographs of some of the facilities and lesions on sows in the farrowing house. This is a feeder-pig producer. The females were purchased as open gilts from an SPF herd. The Duroc boars were purchased from another SPF source. The gilts started showing up with swollen foot bulbs while in gestation with their first litters.
Manure is scraped to a slatted area just outside the pens.
I would assess the sanitation to be very acceptable and the pens are in good repair. The cement has been used for years in this same manner for years with no foot problems. Pictures 1-3 Shows the outdoor portion of breeding and gestation pens with solid cement floors. Manure is hand-scraped as needed to an area of slats. While lameness is evident, it is not as severe as what one might expect from looking at the bottom of the hooves.