Wildlife officials say a virus is causing rabbits in Colorado to sprout horn-like growths. What is rabbit papillomavirus and is it dangerous to pets?

As weird and concerning as they appear, the virus that causes the dark, wart-like horns or tentacles to grow on cottontail rabbits is relatively common and usually not anything to worry about.

Rabbits infected with the Shope papilloma virus have growth on their heads and faces resembling “horns and tentacles.” ...

A rabbit in Fort Collins with horn-like growths sparked a viral fascination worldwide, but experts say it’s a harmless, ...

It's a story that has everyone talking about Fort Collins, Colorado -- a photo of a rabbit that appears to have horns or tentacle-like growths on its face. Colorado State University says the virus is ...

The ‘zombie’ squirrels are covered in hairless, wart-like growths stemming from a condition called fibromatosis ...