Cairn Terrier!
The Cairn Terrier is a terrier breed originating in the Scottish Highlands and recognized as one of Scotland's earliest working dogs.
Cairn terriers originated in the Scottish Highlands and the Isle of Skye.[1] Prior to 1873, terriers in Scotland were collectively referred to as 'Scottish Terriers'.[2] In the early days of the breed's establishment, the name 'short haired Skye Terrier' was used.[3][4] After concerns raised by the Skye Terrier Club, the name 'Cairn Terrier' was given to the breed instead.[2]
The name 'Cairn Terrier' comes from Cairn, where the terriers often flushed out vermin.[5]
https://en.wikipedia.org/wiki/Cairn_Terrier
The word “cairn” refers to a stack of stones, formed either naturally or by human hands, that is used as road markers and memorials. These are
prime real estate for mice, rats, and other small vermin, and the dogs were developed to go in and flush them out.
They do not give up. There is a story of a working Cairn in Britain whose job was to help clear otters from seaside rock formations. The terrier grabbed the otter and held tight, even after the animal plunged into the sea. His owner had to dive underwater to rescue his dog and found the little terrier with his teeth still in the otter.
https://www.akc.org/expert-advice/lifestyle/7-facts-cairn-terrier/
