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'Frankenstein' rabbits with 'tentacles' explained as experts issue warning after they invade the US
Home>News>US News
Updated 10:50 13 Aug 2025 GMT+1Published 10:27 13 Aug 2025 GMT+1

'Frankenstein' rabbits with 'tentacles' explained as experts issue warning after they invade the US

The disease is sweeping through rabbit colonies in the US as wildlife experts stress residents not to go near them after Covid-19 outbreak

Joe Yates

Joe Yates

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Featured Image Credit: Education Images/Getty

Topics: US News, Animals

Joe Yates
Joe Yates

Joe is a journalist for UNILAD, who particularly enjoys writing about crime. He has worked in journalism for five years, and has covered everything from murder trials to celeb news.

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@JMYjourno

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A disturbing virus is sweeping through soft cuddly bunnies in the US and turning them into nightmarish 'Frankenstein' rabbits with 'tentacles' protruding out of their tiny faces.

It sounds like something out of Wallace & Gromit, but these were-rabbits are very much real and have been spotted lurking across Fort Collins in Colorado - which is located roughly an hour's drive north of Denver.

Okay, 'lurking' makes them sound much more sinister than they actually are, while in actual fact, they are just poor little bunnies that contracted a potentially fatal virus that could eventually kill them as the horns grow longer, until eventually they will no longer be able to see or eat, before finally succumbing to starvation.

It sounds horrific, but that's the worst case scenario; in other cases in cottontail rabbits, the disease will go away after a year.

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"It looked like black quills or black toothpicks sticking out all around its mouth," described Fort Collins resident Susan Mansfield, who spoke to WLBT.

"I thought he'd die off during the winter, but he didn't. He came back a second year - and it grew."

What is cottontail rabbit papilloma virus (CRPV)?

Yes, it's called cottontail rabbit papilloma virus (CRPV) and it was first discovered on cottontail rabbits in Midwestern America back in 1933 by Richard E. Shope.

It is also known as Shope papilloma virus - a nod to its discoverer - and it's an oncogenic DNA virus, which just means that it causes tumors.

They are found on the skin of rabbits, while papillomavirs can also lead to the development of squamous cell carcinomas - cancer.

Bunny with cottontail rabbit papilloma virus in Minnesota (CRPV)(Education Images/Universal Images Group via Getty Images)
Bunny with cottontail rabbit papilloma virus in Minnesota (CRPV)(Education Images/Universal Images Group via Getty Images)

How does CRPV spread?

Researchers understand that it is transmitted in the first instance through diseases carried by mosquitos and ticks, among other biting insects, but it can also be passed on rabbit-to-rabbit.

Yes, direct contact between infected rabbits - particularly through skin lesions - can also cause the virus to spread.

Finally, it can also be passed through bedding, food and water bowls, while studies also suggest that papillomaviruses can be transmitted through blood transfusions too... although you'd have to be hopping mad to think rabbits can do that (with the exception of Bugs Bunny).

Some rabbits with the virus die of starvation due to the 'horns' growing around their mouth and eyes (Education Images/Universal Images Group via Getty Images)
Some rabbits with the virus die of starvation due to the 'horns' growing around their mouth and eyes (Education Images/Universal Images Group via Getty Images)

What have experts said about CRPV?

You'll be glad to hear that CRPV is a non-zootonic disease - meaning it doesn't pass between animals and humans, but that doesn't mean you should go anywhere near them.

That's because non-zootonic diseases can mutate - which is what we saw with SARS-CoV-2, which is the virus that causes the disease known as Covid-19.

Colorado Parks and Wildlife (CPW) has made its expert opinion on the matter known.

It states, per Eyewitness News 3, that anybody who encounters the infected rabbits must avoid all contact and stay away from them.

Medical experts are urging domestic rabbit owners to keep their pets away from pests, but if they do succumb to a mosquito bite, vets can surgically remove the tumours before malignancy sets in.

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