Rabies had not occured to me..... This is something we'll have to consider carefully.
Buns tend to be very sociable and ours (about 65)live in various size groups and are divided between 6 pens on about 1.5 acres. A contagious condition in one of the larger yards would be devastating. We're open to any and all ideas if anyone else has something to add.
Thanks again for your input.