A horse was euthanized after being diagnosed with rabies in Massachusetts, according to Enterprisenews.com. Veterinarian Bruce Chase diagnosed the horse, who had not been vaccinated and had been exposed to a rabid skunk, according to public health officials.

Chase told the website that it was only the third case of rabies in a horse during the past 10 years in Massachusetts. The veterinarian had never before diagnosed a horse with rabies in 34 years of practice. The horse lived on a property in Freetown, Mass.

The horse was diagnosed April 3, and the Massachusetts Department of Public Health investigated the case. Rabies remains a "low-level but constant threat to all pets, livestock, and people," DPH spokeswoman Jennifer Manley told the website. Vaccination has drastically reduced the incidence of rabies in domestic animals since an outbreak in the state in 1992.