Rabbits growing apparent tentacle-like growths out of their heads have been spotted in Colorado, NBC affiliate KUSA in Denver reported.

Residents like Susan Mansfield in Fort Collins, Colorado, started seeing the animals with black quills around their mouths in recent months.

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“It looks like it was black quills or black toothpicks sticking out all around his or her mouth,” Mansfield told KUSA. “I thought he would die off during the winter, but he didn’t. He came back a second year, and it grew.”

Another resident described the rabbits as having “a scabbiesh-looking growth over their face.”

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