Duck yards should be maintained in a clean condition by removing the upper few inches of soil and replacing it with clean soil preferably sand whenever necessary. It is also beneficial to provide dim light by means of low wattage bulbs during dark periods to help prevent stampeding if the flock is disturbed and to discourage feather pecking. Afterwards this can be gradually reduced to about half this amount so long as there is no crowding at the feed hoppers. What made this outbreak so serious was the amount of time between infection being present at the first outbreak locus, and the time when countermeasures were put into operation against the disease, such as transport bans and detergent washing of both vehicles and personnel entering livestock areas. Herpes simplex Herpetic whitlow Herpes gladiatorum Herpes simplex keratitis Herpetic sycosis Neonatal herpes simplex Herpes genitalis Herpes labialis Eczema herpeticum Herpetiform esophagitis. These outbreaks caused a cull of all at-risk animals in the area surrounding Egham, including two farms near the famous four-star hotel Great Fosters.