Dr. Damien Barrett:

This is a reflection of herd size. When you have bigger herds, you have more susceptible animals that can acquire infection. That is really the driver. Do we have concerns about zero-grazing? I would like to address that in particular. Yes, we do. Our concern is that, if a farmer is zero-grazing, the grass is being fed fresh. If that grass happens to have been contaminated by a badger, it does not go through the ensiling process that harvested silage does.

We would have a concern around that. There is no concern around diet feeding or anything like that. On susceptibility or organic, there is no reason to suggest that organic cattle are any more or less susceptible than conventional.