Here in Iceland sheep are sent to run free and graze in mountain pastures from spring until autumn. The animals are cold hardy and have a strong, reactive immune system. The sheep have evolved over 1,100 years under difficult farming conditions in Iceland, with a resultant sturdy and efficient constitution.
On a trip up to the highlands the other day I came upon this friendly and curious one horned ram standing in the middle of the road just like that. We almost had to push him out of the way