It's been suggested by a veterinarian that the EHD virus can be transmitted by saliva and feces. If you have an infected animal it's best to remove it to quarantine if possible. I add a small amount of chlorine to my water troughs every day. That may reduce transmission through the water but they would still possibly contaminate the feed. We're still in the learning phase of EHD but Blue Tongue is so similar and so much research has been done, especially in Europe that we might be able to use some of their practices to aid us.