The inhabitants of Måstad, on Værøy, varied their fishy diet by catching puffins from the neighbouring sea cliffs, then curing the bird meat in salt. They were assisted in this arduous task by specially bred dogs known as puffin dogs, or Lundehund. In order to improve their stability and traction on the steep cliffs, these small (32–38cm high) and innocuous-looking dogs developed several distinctive features, including being six-toed (as opposed to the usual four), which helps them to grip on slippery skerries and wriggle themselves through small spaces. They are also extremely flexible, with legs that bend outwards to the extent that the dog can lay completely prone on its chest (reindeer can perform similar manoeuvres). They can also close their ears against dust and moisture and can bend their heads right round onto their backs. Once reduced to only five remaining dogs, the breed was brought back from near-extinction in the 1960s and now numbers well over a thousand, a quarter of whom live in the United States.