Two Weld County horses have tested positive for rabies.  The horses are at separate locations and their cases are unrelated. . So far this year, three horses have been euthanized after showing severe clinical signs and subsequently tested positive for rabies. The first case was confirmed in Logan County in April. The Colorado Department of Agriculture is encouraging livestock and pet owners to discuss the need for rabies vaccination with their local veterinarian and to monitor their animals for behavioral changes.