House foals in well ventilated, dust-free barns and to avoid dirt paddocks and crowding. Pastures must be rotated to decrease dust.

Heavily contaminated farms are usually recognized as overgrazed with dusty paddocks. Keeping large numbers of mares and foals on manure-containing paddocks can result in infections with virulent bacteria.

Foals with active disease must be quarantined in a separate barn, because they are the major source of contamination of the farm with virulent organisms. Their manure should be composted.