The video which has been watched over 180,000 times, shows the sheep named Terry grazing casually in a field despite its deformity.

The authenticity of video has been questioned by some people online, leading Mr McNamara to post photos on the Imgur site to show the animal in more detail.

He writes on his YouTube page that the animal, which may have been born with twisted spine, has been checked by a vet to ensure that it is in no pain…