Farmers and support workers say bluetongue has hit agriculture hard and fear it will have a "lasting impact".
Farmers who have lost animals to the virus are feeling "a tremendous sense of grief"
Conservation initiative The Grazing Project has pioneered use of the collars on large flocks of sheep, with its efforts so successful it is now training four grazing cows to use the collars too.
France has temporarily relaxed rules for making some of its best-known cheeses after the summer drought drastically reduced the amount of grass available to feed milk herds.