An abandoned puppy, aptly named Narwhal, has found online fame for his unique (and unicorn-like) birth defect. Staff at Mac’s Mission , a Missouri rescue group that specializes in dogs with special needs, injuries or abuse, have taken on the 10-week-old pup, who was born with an extra tail ― right in the middle of his forehead.

https://www.huffpost.com/entry/narwhal-unicorn-puppy-tail-head_n_5dccafaae4b03a7e0294b001