Cap

Cap is Morgan's sheep dog. He is fairly old according to Val, who remembers the dog from the last time she visited Blainau in 1979. Cap is a border collie, and a male dog, which is uncommon for sheep dogs. In episode 3, Morgan notes that Cap "isn't used to other dogs" and "will only scrap", which is why he does not bring Cap with him to herd sheep up on the Ridge. Despite this, Cap is known to be a reliable sheep dog and works well with Morgan, responding to his commands only.

In episode 3, Morgan admits that he saw Lee take Cap out to try and work some sheep. This attempt was presumably not entirely successful.

Breeding
Cap is presumably bred from the same lineage of sheep dogs as Winston Cap, a sheep dog bred in 1963. Cap's name may reflect this lineage.