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. The lateral toe seemed to be more often involved but not exclusively. The herd veterinarian and the owner note the condition seems to worsen in gestation and then improves while the sows are in the farrowing house. The farrowing crate flooring is tri-bar. No problems were noted in the boars until more recently.