Sightings of rabbits in northern Colorado with horn-like growths coming from their heads and near their mouths have recently stirred interest—and disgust—among local residents and across social media.

The unsightly bunnies are infected with cottontail rabbit papillomavirus, which can cause growths that resemble warts or tentacles. By Hannah Ziegler With black spikes growing on their heads, ...

Rabbits with horn-like growths caused by Shope papilloma virus have been reported in Colorado. The virus is not contagious to humans or other animals, but direct contact with infected rabbits should ...